Average Weather in September in Acres Green Colorado, United States
Daily high temperatures decrease by 10°F, from 81°F to 71°F, rarely falling below 58°F or exceeding 89°F.
Daily low temperatures decrease by 11°F, from 56°F to 45°F, rarely falling below 35°F or exceeding 62°F.
For reference, on July 10, the hottest day of the year, temperatures in Acres Green typically range from 60°F to 86°F, while on December 30, the coldest day of the year, they range from 21°F to 42°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
The month of September in Acres Green experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 31% to 26%. The lowest chance of overcast or mostly cloudy conditions is 25% on September 16.
The clearest day of the month is September 16, with clear, mostly clear, or partly cloudy conditions 75% of the time.
For reference, on May 7, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on September 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.
Cloud Cover Categories in September
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 Acres Green, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 21% and ending it at 12%.
For reference, the year's highest daily chance of a wet day is 32% on August 4, and its lowest chance is 5% on December 19.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Acres Green is gradually decreasing, starting the month at 1.2 inches, when it rarely exceeds 2.1 inches or falls below 0.4 inches, and ending the month at 0.7 inches, when it rarely exceeds 1.5 inches or falls below 0.1 inches.
Average Monthly Rainfall in September
Over the course of September in Acres Green, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 14 minutes, implying an average daily decrease of 2 minutes, 33 seconds, and weekly decrease of 17 minutes, 50 seconds.
The shortest day of the month is September 30, with 11 hours, 49 minutes of daylight and the longest day is September 1, with 13 hours, 3 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Acres Green is 6:27 AM on September 1 and the latest sunrise is 27 minutes later at 6:54 AM on September 30.
The latest sunset is 7:30 PM on September 1 and the earliest sunset is 47 minutes earlier at 6:43 PM on September 30.
Daylight saving time is observed in Acres Green during 2018, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:32 AM and sets 14 hours, 58 minutes later, at 8:30 PM, while on December 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 22 minutes later, at 4:38 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Acres Green is essentially constant during September, remaining around 0% throughout.
For reference, on July 27, 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 September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Acres Green is gradually increasing during September, increasing from 7.3 miles per hour to 7.8 miles per hour over the course of the month.
For reference, on April 1, 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 7.2 miles per hour.
Average Wind Speed in September
Wind Direction in September
The growing season in Acres Green typically lasts for 5.1 months (156 days), from around May 4 to around October 7, rarely starting before April 16 or after May 20, and rarely ending before September 17 or after October 28.
The month of September in Acres Green is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly decreasing from 99% to 67% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Acres Green are increasing during September, increasing by 383°F, from 2,219°F to 2,603°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Acres Green is gradually decreasing during September, falling by 0.9 kWh, from 6.1 kWh to 5.2 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Acres Green are 39.557 deg latitude, -104.896 deg longitude, and 5,840 ft elevation.
The topography within 2 miles of Acres Green contains significant variations in elevation, with a maximum elevation change of 492 feet and an average elevation above sea level of 5,827 feet. Within 10 miles contains significant variations in elevation (1,460 feet). Within 50 miles contains very significant variations in elevation (9,505 feet).
The area within 2 miles of Acres Green is covered by artificial surfaces (70%) and shrubs (23%), within 10 miles by artificial surfaces (36%) and shrubs (31%), and within 50 miles by grassland (39%) and trees (27%).
This report illustrates the typical weather in Acres Green 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Acres Green.
For each station, the records are corrected for the elevation difference between that station and Acres Green 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 Acres Green is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Acres Green and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .