Average Weather in May in Northglenn Colorado, United States
Daily high temperatures increase by 10°F, from 66°F to 76°F, rarely falling below 51°F or exceeding 88°F.
Daily low temperatures increase by 9°F, from 41°F to 51°F, rarely falling below 32°F or exceeding 58°F.
For reference, on July 10, the hottest day of the year, temperatures in Northglenn typically range from 60°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 May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
The month of May in Northglenn experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 46% to 39%. The highest chance of overcast or mostly cloudy conditions is 47% on May 5.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 61% of the time.
For reference, on May 5, 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 May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Northglenn, the chance of a wet day over the course of May is essentially constant, remaining around 27% throughout.
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 May in Northglenn, the chance of a day with only rain increases from 23% to 26%, the chance of a day with mixed snow and rain decreases from 2% to 0%, and the chance of a day with only snow remains an essentially constant 0% throughout.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Northglenn is essentially constant, remaining about 1.8 inches throughout, and rarely exceeding 3.5 inches or falling below 0.5 inches.
The highest average 31-day accumulation is 1.9 inches on May 16.
Average Monthly Rainfall in May
Over the course of May in Northglenn, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 53 minutes, implying an average daily increase of 1 minute, 47 seconds, and weekly increase of 12 minutes, 27 seconds.
The shortest day of the month is May 1, with 13 hours, 54 minutes of daylight and the longest day is May 31, with 14 hours, 48 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Northglenn is 6:00 AM on May 1 and the earliest sunrise is 26 minutes earlier at 5:33 AM on May 31.
The earliest sunset is 7:54 PM on May 1 and the latest sunset is 27 minutes later at 8:21 PM on May 31.
Daylight saving time is observed in Northglenn during 2018, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:31 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 in May
The chance that a given day will be muggy in Northglenn is essentially constant during May, 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 May
The average hourly wind speed in Northglenn is gradually decreasing during May, decreasing from 8.1 miles per hour to 7.5 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 May
Wind Direction in May
The growing season in Northglenn typically lasts for 5.4 months (163 days), from around April 29 to around October 10, rarely starting before April 9 or after May 17, and rarely ending before September 17 or after November 2.
The month of May in Northglenn is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly increasing from 55% to 100% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Northglenn are increasing during May, increasing by 281°F, from 260°F to 541°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Northglenn is gradually increasing during May, rising by 0.9 kWh, from 6.6 kWh to 7.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Northglenn are 39.886 deg latitude, -104.987 deg longitude, and 5,315 ft elevation.
The topography within 2 miles of Northglenn contains only modest variations in elevation, with a maximum elevation change of 377 feet and an average elevation above sea level of 5,363 feet. Within 10 miles contains only modest variations in elevation (928 feet). Within 50 miles contains very significant variations in elevation (9,810 feet).
The area within 2 miles of Northglenn is covered by artificial surfaces (87%) and shrubs (13%), within 10 miles by shrubs (47%) and artificial surfaces (33%), and within 50 miles by grassland (31%) and trees (27%).
This report illustrates the typical weather in Northglenn 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 Northglenn.
For each station, the records are corrected for the elevation difference between that station and Northglenn 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 Northglenn is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Northglenn and a given station.
The stations contributing to this reconstruction are: Rocky Mountain Metropolitan Airport (41%, 11 kilometers, west); Erie Municipal (32%, 16 kilometers, north); and Denver / Stapleton International, Co. (27%, 18 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .