Average Weather in November in Thornton Colorado, United States
Daily high temperatures decrease by 11°F, from 60°F to 48°F, rarely falling below 32°F or exceeding 74°F.
Daily low temperatures decrease by 9°F, from 35°F to 26°F, rarely falling below 13°F or exceeding 45°F.
For reference, on July 13, the hottest day of the year, temperatures in Thornton typically range from 61°F to 88°F, while on December 30, the coldest day of the year, they range from 22°F to 43°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
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The month of November in Thornton experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 36% to 41%.
The clearest day of the month is November 1, with clear, mostly clear, or partly cloudy conditions 64% of the time.
For reference, on March 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 47%, while on September 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.
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 Thornton, the chance of a wet day over the course of November is decreasing, starting the month at 13% and ending it at 8%.
For reference, the year's highest daily chance of a wet day is 30% on July 23, and its lowest chance is 6% on December 19.
Over the course of November in Thornton, the chance of a day with only rain decreases from 8% to 2%, the chance of a day with mixed snow and rain remains an essentially constant 3% throughout, and the chance of a day with only snow increases from 2% to 4%.
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 Thornton is gradually decreasing, starting the month at 0.5 inches, when it rarely exceeds 1.1 inches or falls below 0.1 inches, and ending the month at 0.2 inches, when it rarely exceeds 0.4 inches.
Average Monthly Rainfall in November
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during November in Thornton is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.7 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in November
Over the course of November in Thornton, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 54 minutes, implying an average daily decrease of 1 minute, 52 seconds, and weekly decrease of 13 minutes, 5 seconds.
The shortest day of the month is November 30, with 9 hours, 35 minutes of daylight and the longest day is November 1, with 10 hours, 29 minutes of daylight.
Hours of Daylight and Twilight in November
The latest sunrise of the month in Thornton is 7:31 AM on November 3 and the earliest sunrise is 59 minutes earlier at 6:32 AM on November 4.
The latest sunset is 5:57 PM on November 1 and the earliest sunset is 1 hour, 22 minutes earlier at 4:35 PM on November 30.
Daylight saving time (DST) ends at 1:00 AM on November 4, 2018, shifting sunrise and sunset to be an hour earlier.
For reference, on June 21, the longest day of the year, the Sun rises at 5:31 AM and sets 15 hours, 0 minutes later, at 8:31 PM, while on December 21, the shortest day of the year, it rises at 7:17 AM and sets 9 hours, 20 minutes later, at 4:38 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 Thornton is essentially constant during November, remaining around 0% throughout.
For reference, on July 16, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, 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 Thornton is gradually increasing during November, increasing from 7.7 miles per hour to 8.6 miles per hour over the course of the month.
For reference, on January 17, the windiest day of the year, the daily average wind speed is 9.8 miles per hour, while on August 19, the calmest day of the year, the daily average wind speed is 6.9 miles per hour.
Average Wind Speed in November
Wind Direction 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).
The growing season in Thornton typically lasts for 5.5 months (166 days), from around April 28 to around October 11, rarely starting before April 7 or after May 16, and rarely ending before September 19 or after November 2.
The month of November in Thornton is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season decreasing from 12% to 0% over the course of the month.
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 Thornton are gradually increasing during November, increasing by 59°F, from 3,103°F to 3,163°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 Thornton is gradually decreasing during November, falling by 1.0 kWh, from 3.6 kWh to 2.6 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 Thornton are 39.868 deg latitude, -104.972 deg longitude, and 5,266 ft elevation.
The topography within 2 miles of Thornton contains only modest variations in elevation, with a maximum elevation change of 446 feet and an average elevation above sea level of 5,273 feet. Within 10 miles contains only modest variations in elevation (830 feet). Within 50 miles contains very significant variations in elevation (9,806 feet).
The area within 2 miles of Thornton is covered by artificial surfaces (73%) and shrubs (27%), within 10 miles by shrubs (48%) and artificial surfaces (35%), and within 50 miles by grassland (32%) and trees (26%).
This report illustrates the typical weather in Thornton 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 Thornton.
For each station, the records are corrected for the elevation difference between that station and Thornton 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 Thornton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Thornton and a given station.
The stations contributing to this reconstruction are: Rocky Mountain Metropolitan Airport (35%, 13 kilometers, west); Denver / Stapleton International, Co. (36%, 16 kilometers, southeast); and Erie Municipal (29%, 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 Tables of the Sun, Moon and Planets , 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.