Average Weather in September in Mendota California, United States
In Mendota, the month of September is characterized by falling daily high temperatures, with daily highs decreasing by 7°F, from 94°F to 87°F over the course of the month, and rarely exceeding 100°F or dropping below 77°F.
Daily low temperatures decrease by 5°F, from 59°F to 55°F, rarely falling below 49°F or exceeding 65°F.
For reference, on July 18, the hottest day of the year, temperatures in Mendota typically range from 62°F to 97°F, while on December 30, the coldest day of the year, they range from 39°F to 56°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 Mendota experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 9% to 15%.
The clearest day of the month is September 3, with clear, mostly clear, or partly cloudy conditions 91% of the time.
For reference, on February 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 50%, while on August 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.
Cloud Cover Categories in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mendota, the chance of a wet day over the course of September is gradually increasing, starting the month at 1% and ending it at 3%.
For reference, the year's highest daily chance of a wet day is 25% on February 20, and its lowest chance is 0% on August 1.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Mendota is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 1.0 inches.
Average Monthly Rainfall in September
Over the course of September in Mendota, 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, 7 minutes, implying an average daily decrease of 2 minutes, 18 seconds, and weekly decrease of 16 minutes, 7 seconds.
The shortest day of the month is September 30, with 11 hours, 50 minutes of daylight and the longest day is September 1, with 12 hours, 56 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Mendota is 6:32 AM on September 1 and the latest sunrise is 23 minutes later at 6:56 AM on September 30.
The latest sunset is 7:29 PM on September 1 and the earliest sunset is 43 minutes earlier at 6:45 PM on September 30.
Daylight saving time is observed in Mendota during 2017, 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 5:43 AM and sets 14 hours, 41 minutes later, at 8:23 PM, while on December 21, the shortest day of the year, it rises at 7:10 AM and sets 9 hours, 39 minutes later, at 4:49 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Mendota is essentially constant during September, remaining around 0% throughout.
For reference, on July 25, the muggiest day of the year, there are muggy conditions 1% 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
The average hourly wind speed in Mendota is gradually decreasing during September, decreasing from 7.1 miles per hour to 6.5 miles per hour over the course of the month.
For reference, on May 30, the windiest day of the year, the daily average wind speed is 9.5 miles per hour, while on January 13, the calmest day of the year, the daily average wind speed is 5.4 miles per hour.
Average Wind Speed in September
Wind Direction in September
The average daily incident shortwave solar energy in Mendota is decreasing during September, falling by 1.5 kWh, from 7.0 kWh to 5.5 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 Mendota are 36.754 deg latitude, -120.382 deg longitude, and 167 ft elevation.
The topography within 2 miles of Mendota is essentially flat, with a maximum elevation change of 36 feet and an average elevation above sea level of 169 feet. Within 10 miles is essentially flat (207 feet). Within 50 miles contains only modest variations in elevation (5,164 feet).
The area within 2 miles of Mendota is covered by cropland (84%) and artificial surfaces (12%), within 10 miles by cropland (90%), and within 50 miles by cropland (49%) and grassland (36%).
This report illustrates the typical weather in Mendota 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 Mendota.
For each station, the records are corrected for the elevation difference between that station and Mendota 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 Mendota is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mendota and a given station.
The stations contributing to this reconstruction are: Madera Municipal Airport (59%, 36 kilometers, northeast); Lemoore Naval Air Station (Reeves Field) (27%, 61 kilometers, southeast); and Hollister Municipal Airport (14%, 94 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .