Average Weather in August in Valley Center California, United States
Daily high temperatures are around 85°F, rarely falling below 78°F or exceeding 93°F. The highest daily average high temperature is 86°F on August 24.
Daily low temperatures are around 61°F, rarely falling below 55°F or exceeding 67°F. The highest daily average low temperature is 61°F on August 23.
For reference, on August 23, the hottest day of the year, temperatures in Valley Center typically range from 61°F to 86°F, while on December 25, the coldest day of the year, they range from 40°F to 63°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
Tafraout, Morocco (6,041 miles away); De Rust, South Africa (10,130 miles); and Bedfordale, Australia (9,394 miles) are the far-away foreign places with temperatures most similar to Valley Center (view comparison).
The month of August in Valley Center 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 45%, while on September 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 90%.
Cloud Cover Categories in August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Valley Center, 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 21% on February 22, and its lowest chance is 1% on June 26.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Valley Center is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.6 inches or falling below -0.0 inches.
Average Monthly Rainfall in August
Over the course of August in Valley Center, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 54 minutes, implying an average daily decrease of 1 minute, 47 seconds, and weekly decrease of 12 minutes, 29 seconds.
The shortest day of the month is August 31, with 12 hours, 53 minutes of daylight and the longest day is August 1, with 13 hours, 46 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Valley Center is 6:01 AM on August 1 and the latest sunrise is 21 minutes later at 6:21 AM on August 31.
The latest sunset is 7:47 PM on August 1 and the earliest sunset is 33 minutes earlier at 7:14 PM on August 31.
Daylight saving time is observed in Valley Center 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 5:39 AM and sets 14 hours, 21 minutes later, at 8:00 PM, while on December 21, the shortest day of the year, it rises at 6:47 AM and sets 9 hours, 57 minutes later, at 4:44 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Valley Center is essentially constant during August, remaining around 3% throughout.
For reference, on August 29, the muggiest day of the year, there are muggy conditions 3% of the time, while on November 7, 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 Valley Center is essentially constant during August, remaining within 0.1 miles per hour of 5.4 miles per hour throughout.
For reference, on April 11, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on September 8, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.
Average Wind Speed in August
Wind Direction in August
Valley Center 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 Valley Center is essentially constant during August, remaining around 70°F throughout.
The highest average surface water temperature during August is 70°F on August 25.
Average Water Temperature in August
The growing season in Valley Center typically lasts for 11 months (337 days), from around January 17 to around December 20, rarely starting after March 5, or ending before November 26.
The month of August in Valley Center 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 Valley Center are rapidly increasing during August, increasing by 655°F, from 2,178°F to 2,833°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Valley Center is gradually decreasing during August, falling by 0.8 kWh, from 7.8 kWh to 7.0 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 Valley Center are 33.218 deg latitude, -117.034 deg longitude, and 1,460 ft elevation.
The topography within 2 miles of Valley Center contains very significant variations in elevation, with a maximum elevation change of 974 feet and an average elevation above sea level of 1,446 feet. Within 10 miles contains very significant variations in elevation (4,564 feet). Within 50 miles also contains extreme variations in elevation (10,728 feet).
The area within 2 miles of Valley Center is covered by shrubs (77%) and grassland (18%), within 10 miles by shrubs (72%) and artificial surfaces (12%), and within 50 miles by shrubs (52%) and water (22%).
This report illustrates the typical weather in Valley Center 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 Valley Center.
For each station, the records are corrected for the elevation difference between that station and Valley Center 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 Valley Center is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Valley Center and a given station.
The stations contributing to this reconstruction are: Ramona Airport (65%, 23 kilometers, southeast); McClellan–Palomar Airport (26%, 25 kilometers, southwest); and Palm Springs International Airport (9%, 83 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .