Spring Weather in Fort Collins Colorado, United States
Daily high temperatures increase by 26°F, from 49°F to 75°F, rarely falling below 34°F or exceeding 87°F.
Daily low temperatures increase by 24°F, from 26°F to 50°F, rarely falling below 14°F or exceeding 56°F.
For reference, on July 13, the hottest day of the year, temperatures in Fort Collins typically range from 60°F to 87°F, while on December 30, the coldest day of the year, they range from 19°F to 40°F.
Average High and Low Temperature in the Spring in Fort Collins
The figure below shows you a compact characterization of the hourly average spring temperatures. 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 the Spring in Fort Collins
The spring in Fort Collins experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 47% to 40%. The highest chance of overcast or mostly cloudy conditions is 48% on April 18.
The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 61% 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 the Spring in Fort Collins
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 Fort Collins, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 10% and ending it at 28%.
For reference, the year's highest daily chance of a wet day is 29% on May 24, and its lowest chance is 7% on December 19.
Over the course of the spring in Fort Collins, the chance of a day with only rain increases from 5% to 28%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow decreases from 3% to 0%.
Probability of Precipitation in the Spring in Fort Collins
To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during the spring in Fort Collins is rapidly increasing, starting the season at 0.4 inches, when it rarely exceeds 1.1 inches, and ending the season at 1.8 inches, when it rarely exceeds 3.1 inches or falls below 0.6 inches.
The highest average 31-day accumulation is 1.9 inches on May 17.
Average Monthly Rainfall in the Spring in Fort Collins
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 the spring in Fort Collins is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.
The highest average 31-day liquid-equivalent accumulation is 0.3 inches on March 19.
Average Monthly Liquid-Equivalent Snowfall in the Spring in Fort Collins
Over the course of the spring in Fort Collins, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 3 hours, 34 minutes, implying an average daily increase of 2 minutes, 21 seconds, and weekly increase of 16 minutes, 27 seconds.
The shortest day of the spring is March 1, with 11 hours, 19 minutes of daylight and the longest day is May 31, with 14 hours, 52 minutes of daylight.
Hours of Daylight and Twilight in the Spring in Fort Collins
The latest sunrise of the spring in Fort Collins is 7:12 AM on March 14 and the earliest sunrise is 1 hour, 41 minutes earlier at 5:32 AM on May 31.
The earliest sunset is 5:52 PM on March 1 and the latest sunset is 2 hours, 32 minutes later at 8:24 PM on May 31.
Daylight saving time (DST) starts at 3:00 AM on March 14, 2021, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 5:29 AM and sets 15 hours, 5 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, 16 minutes later, at 4:36 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in Fort Collins
The figure below presents a compact representation of key lunar data for the spring of 2021. 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. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. 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.
Moon Rise, Set & Phases in the Spring in Fort Collins
The chance that a given day will be muggy in Fort Collins is essentially constant during the spring, 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 the Spring in Fort Collins
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Fort Collins is rapidly decreasing during the spring, decreasing from 10.2 miles per hour to 7.5 miles per hour over the course of the season.
For reference, on January 18, the windiest day of the year, the daily average wind speed is 11.6 miles per hour, while on August 19, the calmest day of the year, the daily average wind speed is 6.6 miles per hour.
Average Wind Speed in the Spring in Fort Collins
The hourly average wind direction in Fort Collins throughout the spring is predominantly from the west, with a peak proportion of 61% on March 1.
Wind Direction in the Spring in Fort Collins
The growing season in Fort Collins typically lasts for 5.4 months (165 days), from around April 30 to around October 11, rarely starting before April 10 or after May 17, and rarely ending before September 20 or after October 30.
During the spring in Fort Collins, the chance that a given day is within the growing season is very rapidly increasing rising from 0% to 100% over the course of the season.
Time Spent in Various Temperature Bands and the Growing Season in the Spring in Fort Collins
The average accumulated growing degree days in Fort Collins are increasing during the spring, increasing by 424°F, from 20°F to 444°F, over the course of the season.
Growing Degree Days in the Spring in Fort Collins
The average daily incident shortwave solar energy in Fort Collins is very rapidly increasing during the spring, rising by 3.1 kWh, from 4.3 kWh to 7.4 kWh, over the course of the season.
Average Daily Incident Shortwave Solar Energy in the Spring in Fort Collins
For the purposes of this report, the geographical coordinates of Fort Collins are 40.585 deg latitude, -105.084 deg longitude, and 5,000 ft elevation.
The topography within 2 miles of Fort Collins contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 4,997 feet. Within 10 miles contains only modest variations in elevation (2,894 feet). Within 50 miles contains large variations in elevation (9,810 feet).
The area within 2 miles of Fort Collins is covered by artificial surfaces (61%), shrubs (21%), and cropland (11%), within 10 miles by grassland (36%) and cropland (25%), and within 50 miles by grassland (45%) and trees (23%).
This report illustrates the typical weather in Fort Collins, 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 Fort Collins.
For each station, the records are corrected for the elevation difference between that station and Fort Collins 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 Fort Collins is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Fort Collins and a given station.
The stations contributing to this reconstruction are: Fort Collins-Loveland Municipal Airport (KFNL, 87%, 16 kilometers, south); Pumpkin Vine (KPUM, 4.9%, 61 kilometers, northwest); and Cheyenne Airport (KCYS, 8%, 68 kilometers, north).
Time zones for airports and weather stations are provided by AskGeo.com .