Average Weather in November in Half Moon Bay California, United States
Daily high temperatures decrease by 5°F, from 64°F to 59°F, rarely falling below 54°F or exceeding 71°F.
Daily low temperatures decrease by 3°F, from 50°F to 47°F, rarely falling below 40°F or exceeding 56°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.
Average High and Low Temperature in November
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on November. 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.
Average Hourly Temperature in November
Valparaíso, Chile (5,872 miles away); Tejeda, Spain (5,897 miles); and Ulverstone, Australia (7,920 miles) are the far-away foreign places with temperatures most similar to Half Moon Bay (view comparison).
The month of November in Half Moon Bay experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 37% to 48%.
The clearest day of the month is November 1, with clear, mostly clear, or partly cloudy conditions 63% of the time.
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%.
Cloud Cover Categories in November
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Half Moon Bay, the chance of a wet day over the course of November is very rapidly increasing, starting the month at 14% and ending it at 24%.
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.
Probability of Precipitation in November
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during November in Half Moon Bay is rapidly increasing, starting the month at 1.5 inches, when it rarely exceeds 3.5 inches or falls below 0.1 inches, and ending the month at 2.8 inches, when it rarely exceeds 5.8 inches or falls below 0.4 inches.
Average Monthly Rainfall in November
Over the course of November in Half Moon Bay, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 49 minutes, implying an average daily decrease of 1 minute, 41 seconds, and weekly decrease of 11 minutes, 47 seconds.
The shortest day of the month is November 30, with 9 hours, 47 minutes of daylight and the longest day is November 1, with 10 hours, 36 minutes of daylight.
Hours of Daylight and Twilight in November
The earliest sunrise of the month in Half Moon Bay is 6:35 AM on November 1 and the latest sunrise is 30 minutes later at 7:05 AM on November 30.
The latest sunset is 5:10 PM on November 1 and the earliest sunset is 19 minutes earlier at 4:51 PM on November 30.
Daylight saving time (DST) ends at 1:00 AM on November 1, 2020, shifting sunrise and sunset to be an hour earlier.
For reference, on June 20, the longest day of the year, the Sun rises at 5:48 AM and sets 14 hours, 45 minutes later, at 8:34 PM, while on December 21, the shortest day of the year, it rises at 7:20 AM and sets 9 hours, 35 minutes later, at 4:55 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in November
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. 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 chance that a given day will be muggy in Half Moon Bay is essentially constant during November, remaining around 0% throughout.
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.
Humidity Comfort Levels in November
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. 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.
The average hourly wind speed in Half Moon Bay is increasing during November, increasing from 8.5 miles per hour to 9.8 miles per hour over the course of the month.
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.
Average Wind Speed in November
The wind direction in Half Moon Bay during November is predominantly out of the west from November 1 to November 9 and the north from November 9 to November 30.
Wind Direction in November
Half Moon Bay is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Half Moon Bay is essentially constant during November, remaining within 1°F of 56°F throughout.
Average Water Temperature in November
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).
Temperatures in Half Moon Bay are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in November
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. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Half Moon Bay are gradually increasing during November, increasing by 144°F, from 1,960°F to 2,104°F, over the course of the month.
Growing Degree Days in November
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Half Moon Bay is decreasing during November, falling by 1.1 kWh, from 3.6 kWh to 2.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in November
For the purposes of this report, the geographical coordinates of Half Moon Bay are 37.464 deg latitude, -122.429 deg longitude, and 138 ft elevation.
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. Within 10 miles contains very significant variations in elevation (2,375 feet). Within 50 miles contains large variations in elevation (4,321 feet).
The area within 2 miles of Half Moon Bay is covered by artificial surfaces (23%), water (22%), grassland (15%), and herbaceous vegetation (13%), within 10 miles by water (40%) and trees (24%), and within 50 miles by water (55%) and grassland (13%).
This report illustrates the typical weather in Half Moon Bay year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Half Moon Bay.
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.
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.
The stations contributing to this reconstruction are: Half Moon Bay Airport (60%, 8 kilometers, northwest); San Carlos Airport (21%, 17 kilometers, east); and San Francisco International Airport (19%, 18 kilometers, north).
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.
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 . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. 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.
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.