Average Weather in September in Peoria Arizona, United States
Daily high temperatures decrease by 8°F, from 102°F to 94°F, rarely falling below 86°F or exceeding 107°F.
Daily low temperatures decrease by 10°F, from 79°F to 69°F, rarely falling below 62°F or exceeding 85°F.
For reference, on July 3, the hottest day of the year, temperatures in Peoria typically range from 81°F to 106°F, while on December 26, the coldest day of the year, they range from 43°F to 65°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 Peoria experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 17% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 14% on September 18.
The clearest day of the month is September 18, with clear, mostly clear, or partly cloudy conditions 86% of the time.
For reference, on February 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 38%, while on June 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%.
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 Peoria, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 16% and ending it at 7%.
For reference, the year's highest daily chance of a wet day is 19% on August 21, and its lowest chance is 0% on June 12.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Peoria is gradually decreasing, starting the month at 0.9 inches, when it rarely exceeds 1.7 inches or falls below 0.2 inches, and ending the month at 0.5 inches, when it rarely exceeds 1.2 inches.
Average Monthly Rainfall in September
Over the course of September in Peoria, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 59 minutes, implying an average daily decrease of 2 minutes, 3 seconds, and weekly decrease of 14 minutes, 20 seconds.
The shortest day of the month is September 30, with 11 hours, 51 minutes of daylight and the longest day is September 1, with 12 hours, 50 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Peoria is 6:03 AM on September 1 and the latest sunrise is 20 minutes later at 6:23 AM on September 30.
The latest sunset is 6:53 PM on September 1 and the earliest sunset is 40 minutes earlier at 6:13 PM on September 30.
Daylight saving time is not observed in Peoria during 2020.
For reference, on June 20, the longest day of the year, the Sun rises at 5:19 AM and sets 14 hours, 23 minutes later, at 7:42 PM, while on December 21, the shortest day of the year, it rises at 7:29 AM and sets 9 hours, 55 minutes later, at 5:25 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Peoria is rapidly decreasing during September, falling from 18% to 2% over the course of the month.
For reference, on August 13, the muggiest day of the year, there are muggy conditions 23% of the time, while on November 27, 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 Peoria is gradually increasing during September, increasing from 6.0 miles per hour to 6.7 miles per hour over the course of the month.
For reference, on April 26, the windiest day of the year, the daily average wind speed is 7.7 miles per hour, while on August 15, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.
Average Wind Speed in September
The wind direction in Peoria during September is predominantly out of the west from September 1 to September 20 and the east from September 20 to September 30.
Wind Direction in September
Temperatures in Peoria are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Peoria are very rapidly increasing during September, increasing by 929°F, from 5,558°F to 6,487°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Peoria is gradually decreasing during September, falling by 0.8 kWh, from 6.5 kWh to 5.7 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 Peoria are 33.581 deg latitude, -112.237 deg longitude, and 1,142 ft elevation.
The topography within 2 miles of Peoria is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 1,138 feet. Within 10 miles is essentially flat (1,125 feet). Within 50 miles contains very significant variations in elevation (6,952 feet).
The area within 2 miles of Peoria is covered by artificial surfaces (55%) and shrubs (40%), within 10 miles by artificial surfaces (49%) and shrubs (46%), and within 50 miles by shrubs (86%).
This report illustrates the typical weather in Peoria 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 Peoria.
For each station, the records are corrected for the elevation difference between that station and Peoria 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 Peoria is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Peoria and a given station.
The stations contributing to this reconstruction are: Luke Air Force Base (56%, 12 kilometers, west); Phoenix-Deer Valley Airport (26%, 19 kilometers, northeast); and Phoenix Sky Harbor International Airport (17%, 28 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .