Average Weather in September in Eagle Mountain Utah, United States
Daily high temperatures decrease by 13°F, from 83°F to 70°F, rarely falling below 57°F or exceeding 89°F.
Daily low temperatures decrease by 12°F, from 57°F to 45°F, rarely falling below 36°F or exceeding 64°F.
For reference, on July 19, the hottest day of the year, temperatures in Eagle Mountain typically range from 63°F to 90°F, while on January 7, the coldest day of the year, they range from 19°F to 32°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 Eagle Mountain experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 22% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 20% on September 10.
The clearest day of the month is September 10, with clear, mostly clear, or partly cloudy conditions 80% of the time.
For reference, on February 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on September 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.
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 Eagle Mountain, the chance of a wet day over the course of September is essentially constant, remaining around 17% throughout.
For reference, the year's highest daily chance of a wet day is 25% on April 29, and its lowest chance is 8% on July 4.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Eagle Mountain is gradually increasing, starting the month at 0.8 inches, when it rarely exceeds 1.7 inches or falls below 0.2 inches, and ending the month at 1.3 inches, when it rarely exceeds 2.5 inches or falls below 0.2 inches.
Average Monthly Rainfall in September
Over the course of September in Eagle Mountain, 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, 16 minutes, implying an average daily decrease of 2 minutes, 37 seconds, and weekly decrease of 18 minutes, 20 seconds.
The shortest day of the month is September 30, with 11 hours, 47 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 Eagle Mountain is 6:56 AM on September 1 and the latest sunrise is 28 minutes later at 7:24 AM on September 30.
The latest sunset is 7:58 PM on September 1 and the earliest sunset is 48 minutes earlier at 7:10 PM on September 30.
Daylight saving time is observed in Eagle Mountain during 2020, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 20, the longest day of the year, the Sun rises at 5:58 AM and sets 15 hours, 3 minutes later, at 9:01 PM, while on December 21, the shortest day of the year, it rises at 7:47 AM and sets 9 hours, 18 minutes later, at 5:05 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Eagle Mountain is essentially constant during September, remaining around 0% throughout.
For reference, on August 5, the muggiest day of the year, there are muggy conditions 0% of the time, while on September 18, 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 Eagle Mountain is essentially constant during September, remaining within 0.2 miles per hour of 6.5 miles per hour throughout.
For reference, on April 4, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on January 21, the calmest day of the year, the daily average wind speed is 5.7 miles per hour.
The highest daily average wind speed during September is 6.7 miles per hour on September 1.
Average Wind Speed in September
The hourly average wind direction in Eagle Mountain throughout September is predominantly from the south, with a peak proportion of 42% on September 1.
Wind Direction in September
The growing season in Eagle Mountain typically lasts for 5.8 months (175 days), from around April 24 to around October 17, rarely starting before April 4 or after May 13, and rarely ending before September 29 or after November 5.
The month of September in Eagle Mountain is more likely than not fully within the growing season, with the chance that a given day is in the growing season decreasing from 100% to 88% 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 Eagle Mountain are increasing during September, increasing by 383°F, from 2,434°F to 2,817°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Eagle Mountain is decreasing during September, falling by 1.3 kWh, from 6.4 kWh to 5.1 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 Eagle Mountain are 40.314 deg latitude, -112.007 deg longitude, and 4,931 ft elevation.
The topography within 2 miles of Eagle Mountain contains very significant variations in elevation, with a maximum elevation change of 879 feet and an average elevation above sea level of 4,963 feet. Within 10 miles contains very significant variations in elevation (5,778 feet). Within 50 miles also contains extreme variations in elevation (7,671 feet).
The area within 2 miles of Eagle Mountain is covered by shrubs (73%) and grassland (18%), within 10 miles by shrubs (64%) and cropland (15%), and within 50 miles by shrubs (53%) and trees (19%).
This report illustrates the typical weather in Eagle Mountain 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 Eagle Mountain.
For each station, the records are corrected for the elevation difference between that station and Eagle Mountain 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 Eagle Mountain is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Eagle Mountain and a given station.
The stations contributing to this reconstruction are: Provo Municipal Airport (69%, 26 kilometers, southeast); Salt Lake City International Airport (26%, 52 kilometers, north); and Wendover Airport (4.6%, 178 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .