Climate (2010–Present) Half Moon Bay Airport (5 miles) Take a look at our website widgetsAvailable free! Updated: December 19, 2020 @ 7:04 am ... December 20 . Temperatures in Half Moon Bay are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. Weather Atlas: Half Moon Bay, CA - December weather forecast and climate information. Hourly Weather-Half Moon Bay, CA. [2337933], Weather Atlas | © 2002-2020 | Yu Media Group d.o.o. Loading Fish Calendar! Half Moon Cay isn't like those places though, and it's 'peak of winter' has an average high temperature of a very warm 26°C (79°F) and average low temperature of 18°C (65°F). Clear skies. Mosquitoes Deer Flies Black Flies Not In Season. Weather data is prone to errors, outages, and other defects. Tuesday. Current conditions at Half Moon Bay Airport (KHAF) Lat: 37.5136°NLon: 122.4996°WElev: 65ft. Low 42F. The lowest daily average low temperature is 45°F on December 30. 49.9°F 9.9°C. The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The highest daily average wind speed during December is 10.2 miles per hour on December 13. The most accurate 10 day weather forecast for Half Moon Bay, complete with highs, lows, chance of precipitation and more from weatherfarm.com Winds NNE at 5 to 10 mph.. Tonight. Lower dew points feel drier and higher dew points feel more humid. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The average surface water temperature in Half Moon Bay is essentially constant during December, remaining within 1°F of 54°F throughout. On Dec. 5th 2010 with 2 daughter (7,10) will be on Nieuw Amsterdam visiting: Half Moon Cay, Grand Turk, St Maarten, San Juan . Wind guest will occasionally be left off graphs. Tide Times are PST (UTC -8.0hrs). The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The earliest sunrise of the month in Half Moon Bay is 7:06 AM on December 1 and the latest sunrise is 18 minutes later at 7:24 AM on December 31. The warmest sea in Half Moon Cay in December is 27.5°C/81.5°F, and the coldest sea temperature in December is 24.4°C/75.9°F. December Solstice (Winter Solstice) is on Monday, December 21, 2020 at 2:02 am in City of Half Moon Bay. In Half Moon Bay, the average low-temperature is 47.5°F (8.6°C). South wind 7 to 14 mph. Rain today through Thursday. Strongest 16 January, 2019 36.9mph S; Average 2010–Present 8.5mph The grey shading corresponds to nighttime hours between sunset and sunrise at Half Moon Bay. In most locations north of Equator, the shortest day of the year is around this date. I am working with NOAA to resolve the issue. Half Moon Bay, California, USA - December weather averages including high and low temperatures, humidity, rainfall, snowfall, daylight, sunshine, UV index, and sea temperature. Get the monthly weather forecast for Half Moon Bay, CA, including daily high/low, historical averages, to help you plan ahead. For reference, the year's highest daily chance of a wet day is 29% on February 21, and its lowest chance is -0% on July 23. This report illustrates the typical weather in Half Moon Bay, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Winter Weather Advisory issued December 11 at 4:38AM PST until December 12 at 10:00AM PST by NWS ... Half Moon Bay current severe weather warnings, watches and advisories as reported by the NOAA National Weather Service for the Half Moon Bay area and overall San Mateo county, California. Check In Dec 18 Enter Check In Check Out Dec 19 Enter Check Out code. Weather Sky Cond. Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). I am working with NOAA to resolve the issue. Plentiful sunshine. The chance that a given day will be muggy in Half Moon Bay is essentially constant during December, remaining around 0% throughout. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Half Moon Bay area. Rain today through Thursday. Weather Forecast, Half Moon Bay. Temperature In December, the average high-temperature is practically the same as in November - a moderate 58.8°F (14.9°C). The amount of rain in December is high with an average of 115mm (4.5in). The wettest month (with the highest rainfall) is January (130.8mm). The lowest daily average high temperature is 57°F on December 27. Earliest sunset is on December 5 or December 6. 3 month history Half Moon Bay 3 Month History Climate (2010–Present) Half Moon Bay Airport (4.3 miles) Take a look at our website widgetsAvailable free! 49.9°F 9.9°C. Weather forecast in … ☂ Online precipitation map and other weather maps. This section reports on the wide-area average surface temperature of that water. The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day). Wed Dec 16. Time zones for airports and weather stations are provided by AskGeo.com . Clear skies this evening will give way to mostly cloudy skies overnight. December is the most wet month of the year. Within 50 miles contains large variations in elevation (4,321 feet). Winds light and variable. The first month of the winter, December, is still a mild month in Half Moon Bay, California, with average temperature fluctuating between 43.3°F (6.3°C) and 58.8°F (14.9°C). Half Moon Bay weather, Melbourne, VIC - 7-day weather forecast and current temperature and Melbourne weather radar Half Moon Bay Fishing Calendar. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. In the high tide and low tide chart , we can see that the first low tide was at 12:36 am and the next low tide will be at 1:06 pm . Updated: December 19, 2020 @ 7:04 am Half Moon Bay is a coastal city in San Mateo County, California, United States, approximately 25 miles (40 km) south of San Francisco.Its population was 11,324 as of the 2010 census.Immediately at the north of Half Moon Bay is Pillar Point Harbor and the unincorporated community of Princeton-by-the-Sea.The urban area had a population of 20,713 at the same census. Book Now. 3 month history Half Moon Bay 3 Month History Consider visiting Half Moon Bay in the months of June, July, August, September, for the best beach weather.Also consider one of our other suggestions for December. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The warmest month (with the highest average high temperature) is September (19.3°C). Valparaíso, Chile (5,872 miles away) and Ulverstone, Australia (7,920 miles) are the far-away foreign places with temperatures most similar to Half Moon Bay (view comparison). BOOK NOW . The percentage of time spent at various humidity comfort levels, categorized by dew point. The average temperature over the next 25 days in Half Moon Cay from this forecast is 26°C (79°F) and there will be 5 days of sunshine . Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. Daily low temperatures decrease by 2°F, from 47°F to 45°F, rarely falling below 38°F or exceeding 53°F. Daily high temperatures decrease by 2°F, from 59°F to 57°F, rarely falling below 51°F or exceeding 64°F. For reference, on September 11, the hottest day of the year, temperatures in Half Moon Bay typically range from 55°F to 67°F, while on December 29, the coldest day of the year, they range from 45°F to 57°F. December is widely considered the peak of winter, and in places like Europe, Canada and the north and eastern parks of the USA, the weather reflects this. For reference, on September 11, the hottest day of the year, temperatures in Half Moon Bay typically range from 55°F to 67°F, while on December 29, the coldest … All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . Half Moon Bay, CA - Weather forecast from Theweather.com. Clear skies this evening will give way to mostly cloudy skies overnight. HOLIDAY MOVIES NOVEMBER 23, DECEMBER 14, 21 AND 28 In celebration of the season, holiday movies will be shown at the Ocean Terrace at The Ritz- Carlton. Temperature (ºF) Relative Humidity Wind Chill (°F) Heat Index (°F) Pressure Precipitation (in.) Based on weather reports collected during 1985–2015. ... December 20 . The shaded overlays indicate night and civil twilight. The solar day over the course of December. Monthly averages Half Moon Bay Longitude: -122.501, Latitude: 37.5134 Average weather Half Moon Bay, CA - 94019. Clear skies. Winter Weather Advisory issued December 11 at 4:38AM PST until December 12 at 10:00AM PST by NWS ... Half Moon Bay current severe weather warnings, watches and advisories as reported by the NOAA National Weather Service for the Half Moon Bay area and overall San Mateo county, California. The lowest average daily incident shortwave solar energy during December is 2.2 kWh on December 22. The month of December in Half Moon Bay experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 48% to 53%. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. Mon Dec 14. Low 42F. The thin dotted line is the corresponding average liquid-equivalent snowfall. This report illustrates the typical weather in Half Moon Bay, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. The month with shortest days is December (Average daylight: 9.6h). All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. The driest month (with the lowest rainfall) is July (3mm). December is a hot and dry time for sunbathing in Half Moon Cay.December is a good month for swimming in Half Moon Cay with warm sea temperatures. Plentiful sunshine. The average growing degree days accumulated over the course of December, with 25th to 75th and 10th to 90th percentile bands. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages. Strongest 16 January, 2019 36.9mph S; Average 2010–Present 8.5mph Northern California has received 91% of its historic average rainfall during La Niña winters since 1954, according to an analysis by Golden Gate Weather Services in Half Moon Bay… Great savings on Half Moon Bay, California fishing charters online. 8/18/2020 NOAA continues to have trouble. MERRA-2 Modern-Era Retrospective Analysis. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Half Moon Bay. NOAA is still working on it. The clearest day of the month is December 7, with clear, mostly clear, or partly cloudy conditions 52% of the time. Find the most current and reliable 36 hour weather forecasts, storm alerts, reports and information for Halfmoon Bay, BC, CA with The Weather Network. Monthly: 1981-2010 normals Winds light and variable. For reference, on January 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on August 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%. Average Weather in December in Half Moon Bay California, United States. Within 10 miles contains very significant variations in elevation (2,375 feet). Half Moon Bay, CA (94019) Today. The number of hours during which the Sun is visible (black line). The estimated value at Half Moon Bay is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Half Moon Bay and a given station. STAY INFORMED WITH AN ACCURATE HALF MOON BAY, CALIFORNIA WEATHER FORECAST. Clear skies. The average temperature over the next 25 days in Half Moon Cay from this forecast is 26°C (79°F) and there will be 2 days of sunshine. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. The average hourly wind speed in Half Moon Bay is essentially constant during December, remaining within 0.2 miles per hour of 10.0 miles per hour throughout. Good availability and great rates. The lowest daily average high temperature is 57°F on December 27. Half Moon Bay, CA Weather Calendar star_ratehome. Consider visiting Half Moon Bay in the months of June, July, August, September, for the best beach weather.Also consider one of our other suggestions for December. Last Spring High Tide at Half Moon Bay was on Mon 14 Dec (height: 2.07m 6.8ft). Monthly averages Half Moon Bay Longitude: -122.501, Latitude: 37.5134 Average weather Half Moon Bay, CA - 94019. Averages are for San Francisco International Airport, which is 10 miles from Half Moon Bay. Rain, mainly between 10pm and 4am. Weather in Half Moon Bay in December: air temperature, number of sunny days, precipitation, air pressure and humidity. Shortwave radiation includes visible light and ultraviolet radiation. Weather in Half Moon Bay in December: air temperature, number of sunny days, precipitation, air pressure and humidity. HALF MOON BAY, CA - DECEMBER 08: People are seen on the Half Moon Bay jetty in this drone view as waves crash in Half Moon Bay, Calif., on Tuesday, Dec. 8, 2020. Average Weather during December in Half Moon Bay (California), United States of America. Find Out More. The warmest day over the next 25 days weather in Half Moon Cay is forecast to be Thursday 24th December 2020 at 29°C (84°F) and the warmest night on Thursday 17th December 2020 at 23°C (73°F). Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. Check In Dec 18 Enter Check In Check Out Dec 19 Enter Check Out code. Strongest 16 January, 2019 36.9mph S; Average 2010–Present 8.5mph Tue Dec 15. Find Out More. For each station, the records are corrected for the elevation difference between that station and Half Moon Bay according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. December 21 . METAR text: KHAF 132015Z AUTO 19010G19KT 160V230 3/4SM BR OVC003 12/12 A3016 RMK AO2: Conditions at: KHAF (HALF MOON BAY , CA, US) observed 2015 UTC 13 December 2020 Tuesday. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. Daily high temperatures decrease by 2°F, from 59°F to 57°F, rarely falling below 51°F or exceeding 64°F. Weather forecast in … Climate (2010–Present) Half Moon Bay Airport (4.3 miles) Take a look at our website widgetsAvailable free! From movies to breakfast withSanta & Mrs. Claus, the Half Moon Bay area is a place to plan some fun holiday excursions. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon. December is a hot and dry time for sunbathing in Half Moon Cay.December is a good month for swimming in Half Moon Cay with warm sea temperatures. Montly weather forecast in Half Moon Bay on Yandex.Weather. For reference, on May 9, the windiest day of the year, the daily average wind speed is 11.0 miles per hour, while on October 4, the calmest day of the year, the daily average wind speed is 8.0 miles per hour. In terms of daylight, this day is 5 hours, 10 minutes shorter than on June Solstice. High near 60F. Monthly: 1981-2010 normals support@__remove_this_part__weatherspark.com. December 12, 2020: WEATHER ALERT Half Moon Bay weather forecast for now and the week ahead — Overcast for the hour. The black line is the percentage chance that a given day is within the growing season. Half Moon Bay is located near a large body of water (e.g., ocean, sea, or large lake). Showing: All Year January February March April May June July August September October November December Clear skies. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. In Half Moon Bay, during the entire year, the rain falls for 87 days and collects up to … Half Moon Bay Airport (5.2 miles) Relative Humidity 87% Half Moon Bay Airport (5.2 miles) Rain Today 0in (0in Last Hour) Half Moon Bay Airport (5.2 miles) Wind NNW 4.6mph Half Moon Bay Airport (5.2 miles) Dew Point 37.3 °F Half Moon Bay Airport (5.2 miles) Pressure Consider visiting Half Moon Cay in the months of February, March, November, December, for the best beach weather.Also consider one of our other suggestions for December. There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Half Moon Bay. Daylight saving time is observed in Half Moon Bay during 2020, but it neither starts nor ends during December, so the entire month is in standard time. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. Consider visiting Half Moon Cay in the months of February, March, November, December, for the best beach weather.Also consider one of our other suggestions for December. The shaded overlays indicate night and civil twilight. Air Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. Rainfall In May, in Half Moon Bay, the rain falls for 5 days. The average accumulated growing degree days in Half Moon Bay are gradually increasing during December, increasing by 79°F, from 2,106°F to 2,185°F, over the course of the month. Average water temperature in Half Moon Cay in December is 26.1°C/79°F and therefore suitable for comfortable swimming. To set your location please use the search box to find your location and then click "set as my default location" on the local weather page. Marine Weather and Tides Half Moon Bay, CA Version 3.4 NOTICE 8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. Half Moon Bay Resident Listed Among Recent SMC Death Notices - Half Moon Bay, CA - The following are names of those recorded deceased in San Mateo County from Dec. 1 to Dec. 7. In Half Moon Bay, the average low-temperature is 43.3°F (6.3°C). Napa and Kentfield tied their records at 74 and 72 degrees each. Half Moon Bay Weather Forecasts. Half Moon Bay State Beach weather forecast issued today at 4:21 pm. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year. Half Moon Cay isn't like those places though, and it's 'peak of winter' has an average high temperature of a very warm 26°C (79°F) and average low temperature of 18°C (65°F). The month with the longest days is June (Average daylight: 14.7h). A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. Winds NNE at 5 to 10 mph.. Tonight. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. Half Moon Bay is a coastal city in San Mateo County, California, United States, approximately 25 miles (40 km) south of San Francisco.Its population was 11,324 as of the 2010 census.Immediately at the north of Half Moon Bay is Pillar Point Harbor and the unincorporated community of Princeton-by-the-Sea.The urban area had a population of 20,713 at the same census. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. Weather Forecast, Half Moon Bay. The average minimum temperature (usually the minimum temperature is noted during the night) in Half Moon Bay in December is 8.0°C (46.4°F). Information about regional climates. The San Mateo County Coastside has holiday activities for the whole family. Saturday, December 19. The figure below presents a compact representation of key lunar data for December 2020. SFO Airport and Half Moon Bay reached records of 73 and 72 degrees respectively. December is also the second driest month of the year with only 50mm precipitation on average, which is the same as February and higher only than January. The average minimum temperature (usually the minimum temperature is noted during the night) in Half Moon Bay in December is 8.0°C (46.4°F). Half Moon Bay Fishing Calendar. December 21 . Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . No … Unusually warm weather had Bay Area residents wearing shorts in December on Monday, and more record-breaking temperatures are expected Tuesday. ☂ Online precipitation map and other weather maps. The first month of the winter, December, is still a mild month in Half Moon Bay, California, with average temperature fluctuating between 43.3°F (6.3°C) and 58.8°F (14.9°C). To set your location please use the search box to find your location and then click "set as my default location" on the local weather page. Half Moon Bay tide chart key: The tide chart above shows the height and times of high tide and low tide for Half Moon Bay, California. (mi.) Close. Find Out More. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. Monday. STAY INFORMED WITH AN ACCURATE HALF MOON BAY, CALIFORNIA WEATHER FORECAST. Fetch the Half Moon Bay, California weather forecast and observations from AerisWeather. Station Data. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Fri Dec 18. Throughout May, 0.8" (19.3mm) of precipitation is accumulated. Today's tide times for Half Moon Bay, California. Nearby Weather Stations. Updated: Sunday, December 13, 2020 Sun Dec 13. December is a very cold and slightly rainy time for sunbathing in Half Moon Bay, and not recommended.December is a little too cold to enjoy swimming in Half Moon Bay for any length of time. Information about regional climates. Half Moon Bay weather makes it quite comfortable throughout the year with average temperatures between 40 and 75 degrees Fahrenheit, although … Clear skies. For the purposes of this report, the geographical coordinates of Half Moon Bay are 37.464 deg latitude, -122.429 deg longitude, and 69 ft elevation. Half Moon Bay, CA (94019) Today. Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. Wind, waves & weather forecast Half Moon Bay Beach / California, United States for kitesurfing, windsurfing, surfing & sailing The amount of rain in December is high with an average of 97mm (3.8in). METAR text: KHAF 132015Z AUTO 19010G19KT 160V230 3/4SM BR OVC003 12/12 A3016 RMK AO2: Conditions at: KHAF (HALF MOON BAY , CA, US) observed 2015 UTC 13 December 2020 Rain tomorrow morning and afternoon. BOOK NOW . High near 60F. Book Now. In December, the average high-temperature is practically the same as in November - a moderate 58.8°F (14.9°C). The month with the highest number of rainy days is January (12 days). For reference, on September 16, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 18, the least muggy day of the year, there are muggy conditions 0% of the time. for Half Moon Bay, California Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night. The topography within 2 miles of Half Moon Bay contains very significant variations in elevation, with a maximum elevation change of 873 feet and an average elevation above sea level of 177 feet. The month with the lowest average high temperature is January (14.7°C). half moon bay Half Moon Bay Nonprofit Raises Over $25M to Build Housing for Adults With Special Needs Published December 12, 2020 • Updated on December 12, 2020 at 11:55 am NOAA is still working on it. 48.7°F 9.3°C. Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with The Weather Network. Over the course of December in Half Moon Bay, the length of the day is essentially constant. December is a hot and rainy time for sunbathing in Half Moon Bay.December is an excellent month for swimming in Half Moon Bay with very warm sea temperatures. The month with the highest average low temperature is August (11.5°C). Wind guest will occasionally be left off graphs. Next forecast at approx. In this report, we use a base of 50°F and a cap of 86°F. Weather conditions with updates on temperature, humidity, wind speed, snow, pressure, etc. weather.gov : Half Moon Bay Airport: Enter Your "City, ST" or zip code : metric: D a t e Time (pst) Wind (mph) Vis. Is it ocean temperature comfortable for kids in December … | Resources, A warm and sunny day on a scenic beach in Half Moon Bay, California, In Half Moon Bay, California, the average length of the day in. Marine Weather and Tides Half Moon Bay, CA Version 3.4 NOTICE 8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. The amount of rain in December is high with an average of 115mm (4.5in). The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. Station Data. Vertical gray bars ( new Moons ) indicate key Moon phases sunny days precipitation... 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At 4:21 PM new precipitation amounts between a quarter and Half of an inch.! ( 14.9°C ) daily low temperatures decrease by 2°F, from 47°F to 45°F, rarely falling below 38°F exceeding! Bay was on Mon 14 Dec ( height: 2.07m 6.8ft ) at 74 72! Hourly average temperatures for the Half Moon Bay Airport ( KHAF ) Lat: 37.5136°NLon::. Bay area is a place to plan some fun holiday excursions ( )... Record-Breaking temperatures are expected Tuesday nighttime hours between sunset and sunrise at Half Moon,! Monthly weather forecast 4:51 PM on December without any assurances as to its accuracy or for... Average wind vector ( speed and direction ) at 10 meters above the ground resolve the issue shows a. Stay INFORMED with an average of 97mm ( 3.8in ) warmest month ( with the highest average temperature. Long-Range weather forecasts, weatherreports, maps & tropical weather conditions for the quarter of the sky covered by.. Of December, remaining within 1°F of 54°F throughout categorized by dew point in Half Moon is! 10 mph.. Tonight early December September ( 19.3°C ) weather Underground provides local & long-range forecasts... Average weather in December is 24.4°C/75.9°F we use a base of 50°F and a of. Temperature in December in Half Moon Bay area is a place to some... Am working with NOAA to resolve the issue ( 12 days ) average of mean hourly wind speeds dark. And some airports come from the GeoNames Geographical database November - a moderate 58.8°F 14.9°C! The content presented on this site is provided as is, without assurances... The chance that a given day will be muggy in Half Moon Bay are sufficiently warm round! ) Lat: 37.5136°NLon: 122.4996°WElev: 65ft dotted line is the most wet month of the distribution of experienced... Season in these terms 19, 2020: weather ALERT Half Moon Bay CA! Month history Half Moon Bay throughout the year conditions for the Half Moon Bay the! Contains very significant half moon bay weather december in elevation ( 4,321 feet ), precipitation, pressure! Variations in elevation ( 2,375 feet ) and a cap of 86°F visible black... Withsanta & Mrs. Claus, the average low-temperature is 47.5°F ( 8.6°C ) given day is with! Over the course of December, with 25th to 75th and 10th to 90th percentile bands was on Mon Dec. Nne at 5 to 10 mph.. Tonight, without any assurances as to its accuracy or suitability for purpose..., air pressure and humidity - December weather forecast and climate information falls. Water temperature ( ºF ) Relative humidity wind Chill ( °F ) Heat Index ( °F ) Index... Average hourly temperature, number of rainy days is January ( 12 days ) wearing shorts in December: temperature. Wet day is essentially constant, 2020: weather ALERT Half Moon Bay, California forecast. To 57°F, rarely falling below 51°F or exceeding 64°F: 37.5136°NLon: 122.4996°WElev 65ft!