Average Weather in December in Wellington Colorado, United States
Daily high temperatures decrease by 5°F, from 44°F to 39°F, rarely falling below 22°F or exceeding 59°F. The lowest daily average high temperature is 39°F on December 30.
Daily low temperatures decrease by 5°F, from 24°F to 20°F, rarely falling below 4°F or exceeding 36°F. The lowest daily average low temperature is 20°F on December 30.
For reference, on July 13, the hottest day of the year, temperatures in Wellington typically range from 60°F to 86°F, while on December 30, the coldest day of the year, they range from 20°F to 39°F.
Average High and Low Temperature in December
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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 December
The month of December in Wellington experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 41% throughout the month.
The clearest day of the month is December 26, with clear, mostly clear, or partly cloudy conditions 60% of the time.
For reference, on April 18, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 48%, while on July 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.
Cloud Cover Categories in December
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 Wellington, the chance of a wet day over the course of December is essentially constant, remaining around 7% throughout.
For reference, the year's highest daily chance of a wet day is 30% on May 25, and its lowest chance is 6% on January 24.
Over the course of December in Wellington, the chance of a day with only rain remains an essentially constant 2% throughout, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 4% throughout.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Wellington is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.3 inches.
The lowest average 31-day accumulation is 0.1 inches on December 19.
Average Monthly Rainfall in December
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 December in Wellington is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.6 inches or falling to 0.0 inches.
The highest average 31-day liquid-equivalent accumulation is 0.2 inches on December 8.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Wellington, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 15 minutes of daylight and the longest day is December 1, with 9 hours, 29 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Wellington is 7:04 AM on December 1 and the latest sunrise is 19 minutes later at 7:23 AM on December 31.
The earliest sunset is 4:32 PM on December 6 and the latest sunset is 10 minutes later at 4:42 PM on December 31.
Daylight saving time is observed in Wellington during 2018, but it neither starts nor ends during December, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:29 AM and sets 15 hours, 6 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, 15 minutes later, at 4:35 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Wellington is essentially constant during December, remaining around 0% throughout.
For reference, on July 18, 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 December
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Wellington is gradually increasing during December, increasing from 11.0 miles per hour to 11.9 miles per hour over the course of the month.
For reference, on January 18, the windiest day of the year, the daily average wind speed is 12.7 miles per hour, while on August 19, the calmest day of the year, the daily average wind speed is 7.1 miles per hour.
Average Wind Speed in December
Wind Direction in December
The growing season in Wellington typically lasts for 5.3 months (162 days), from around May 1 to around October 10, rarely starting before April 11 or after May 18, and rarely ending before September 19 or after October 30.
The month of December in Wellington is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Wellington are essentially constant during December, remaining within 4°F of 2,714°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Wellington is essentially constant during December, remaining within 0.1 kWh of 2.4 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 2.3 kWh on December 21.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Wellington are 40.704 deg latitude, -105.009 deg longitude, and 5,217 ft elevation.
The topography within 2 miles of Wellington contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 5,207 feet. Within 10 miles contains only modest variations in elevation (1,352 feet). Within 50 miles contains very significant variations in elevation (9,797 feet).
The area within 2 miles of Wellington is covered by cropland (52%) and grassland (41%), within 10 miles by grassland (67%) and cropland (23%), and within 50 miles by grassland (53%) and trees (18%).
This report illustrates the typical weather in Wellington 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 Wellington.
For each station, the records are corrected for the elevation difference between that station and Wellington 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 Wellington is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Wellington and a given station.
The stations contributing to this reconstruction are: Fort Collins-Loveland Municipal Airport (67%, 28 kilometers, south); Cheyenne Airport (23%, 53 kilometers, north); and Pumpkin Vine (10%, 54 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .