Average Weather in August in Hesperia California, United States
Daily high temperatures decrease by 3°F, from 95°F to 92°F, rarely falling below 84°F or exceeding 101°F.
Daily low temperatures decrease by 3°F, from 66°F to 63°F, rarely falling below 56°F or exceeding 72°F.
For reference, on July 27, the hottest day of the year, temperatures in Hesperia typically range from 66°F to 95°F, while on December 25, the coldest day of the year, they range from 34°F to 56°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in Hesperia experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 12% throughout the month.
The clearest day of the month is August 31, with clear, mostly clear, or partly cloudy conditions 89% of the time.
For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on September 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.
Cloud Cover Categories in August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Hesperia, the chance of a wet day over the course of August is essentially constant, remaining around 4% throughout.
For reference, the year's highest daily chance of a wet day is 18% on February 21, and its lowest chance is 1% on June 15.
Probability of Precipitation in August
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during August in Hesperia is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.
Average Monthly Rainfall in August
Over the course of August in Hesperia, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 56 minutes, implying an average daily decrease of 1 minute, 52 seconds, and weekly decrease of 13 minutes, 4 seconds.
The shortest day of the month is August 31, with 12 hours, 55 minutes of daylight and the longest day is August 1, with 13 hours, 51 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Hesperia is 5:59 AM on August 1 and the latest sunrise is 22 minutes later at 6:21 AM on August 31.
The latest sunset is 7:50 PM on August 1 and the earliest sunset is 34 minutes earlier at 7:16 PM on August 31.
Daylight saving time is observed in Hesperia during 2018, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:37 AM and sets 14 hours, 28 minutes later, at 8:04 PM, while on December 21, the shortest day of the year, it rises at 6:51 AM and sets 9 hours, 51 minutes later, at 4:42 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Hesperia is essentially constant during August, remaining around 1% throughout.
The highest chance of a muggy day during August is 1% on August 22.
For reference, on August 22, the muggiest day of the year, there are muggy conditions 1% of the time, while on October 31, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in August
The average hourly wind speed in Hesperia is gradually decreasing during August, decreasing from 7.1 miles per hour to 6.5 miles per hour over the course of the month.
For reference, on May 3, the windiest day of the year, the daily average wind speed is 8.5 miles per hour, while on September 9, the calmest day of the year, the daily average wind speed is 6.4 miles per hour.
Average Wind Speed in August
Wind Direction in August
Hesperia is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Hesperia is essentially constant during August, remaining around 69°F throughout.
The highest average surface water temperature during August is 69°F on August 26.
Average Water Temperature in August
The growing season in Hesperia typically lasts for 8.5 months (260 days), from around March 9 to around November 24, rarely starting before January 30 or after April 6, and rarely ending before November 4 or after December 17.
The month of August in Hesperia is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in Hesperia are rapidly increasing during August, increasing by 801°F, from 2,583°F to 3,384°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Hesperia is gradually decreasing during August, falling by 0.8 kWh, from 7.9 kWh to 7.1 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Hesperia are 34.426 deg latitude, -117.301 deg longitude, and 3,169 ft elevation.
The topography within 2 miles of Hesperia contains only modest variations in elevation, with a maximum elevation change of 335 feet and an average elevation above sea level of 3,181 feet. Within 10 miles contains only modest variations in elevation (3,002 feet). Within 50 miles contains large variations in elevation (11,332 feet).
The area within 2 miles of Hesperia is covered by shrubs (99%), within 10 miles by shrubs (90%), and within 50 miles by shrubs (78%).
This report illustrates the typical weather in Hesperia 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Hesperia.
For each station, the records are corrected for the elevation difference between that station and Hesperia 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 Hesperia is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Hesperia and a given station.
The stations contributing to this reconstruction are: Southern California Logistics Airport (73%, 19 kilometers, northwest); San Bernardino International Airport (12%, 37 kilometers, south); Ontario International Airport (9%, 51 kilometers, southwest); and Twenty-Nine Palms, Marine Corps Air-Ground Combat Center (6%, 105 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .