Summer Weather in Cloverdale California, United States

Daily high temperatures increase by 7°F, from 78°F to 85°F, rarely falling below 68°F or exceeding 96°F. The highest daily average high temperature is 87°F on July 28.

Daily low temperatures are around 52°F, rarely falling below 45°F or exceeding 59°F. The highest daily average low temperature is 54°F on July 25.

For reference, on July 28, the hottest day of the year, temperatures in Cloverdale typically range from 54°F to 87°F, while on January 1, the coldest day of the year, they range from 36°F to 54°F.

The figure below shows you a compact characterization of the hourly average summer temperatures. 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.

Chillán, Chile (6,143 miles away) is the far-away foreign place with temperatures most similar to Cloverdale (view comparison).

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The summer in Cloverdale experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 29% to 12%. The lowest chance of overcast or mostly cloudy conditions is 9% on July 29.

The clearest day of the summer is July 29, with clear, mostly clear, or partly cloudy conditions 91% of the time.

For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Cloverdale, the chance of a wet day over the course of the summer is decreasing, starting the season at 6% and ending it at 2%.

For reference, the year's highest daily chance of a wet day is 35% on February 23, and its lowest chance is 0% on July 19.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the summer in Cloverdale is gradually decreasing, starting the season at 0.6 inches, when it rarely exceeds 2.2 inches or falls below -0.0 inches, and ending the season at 0.1 inches, when it rarely exceeds 0.5 inches.

The lowest average 31-day accumulation is 0.0 inches on July 30.

Over the course of the summer in Cloverdale, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 40 minutes, implying an average daily decrease of 1 minute, 6 seconds, and weekly decrease of 7 minutes, 43 seconds.

The shortest day of the summer is August 31, with 13 hours, 3 minutes of daylight and the longest day is June 20, with 14 hours, 53 minutes of daylight.

The earliest sunrise of the summer in Cloverdale is 5:46 AM on June 14 and the latest sunrise is 54 minutes later at 6:40 AM on August 31.

The latest sunset is 8:41 PM on June 28 and the earliest sunset is 58 minutes earlier at 7:43 PM on August 31.

Daylight saving time is observed in Cloverdale during 2025, but it neither starts nor ends during the summer, so the entire season is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:47 AM and sets 14 hours, 53 minutes later, at 8:40 PM, while on December 21, the shortest day of the year, it rises at 7:27 AM and sets 9 hours, 27 minutes later, at 4:53 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the summer of 2025. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Cloverdale is essentially constant during the summer, remaining around 0% throughout.

For reference, on June 28, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Cloverdale is decreasing during the summer, decreasing from 6.9 miles per hour to 5.6 miles per hour over the course of the season.

For reference, on June 6, the windiest day of the year, the daily average wind speed is 6.9 miles per hour, while on September 21, the calmest day of the year, the daily average wind speed is 5.4 miles per hour.

The highest daily average wind speed during the summer is 6.9 miles per hour on June 6.

The hourly average wind direction in Cloverdale throughout the summer is predominantly from the west, with a peak proportion of 63% on July 17.

Cloverdale 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 Cloverdale is increasing during the summer, rising by 4°F, from 52°F to 55°F, over the course of the season.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Cloverdale typically lasts for 8.6 months (262 days), from around March 3 to around November 20, rarely starting before January 28 or after April 8, and rarely ending before October 31 or after December 12.

The summer in Cloverdale is reliably fully within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Cloverdale are very rapidly increasing during the summer, increasing by 1,529°F, from 748°F to 2,277°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Cloverdale is gradually decreasing during the summer, falling by 1.0 kWh, from 7.9 kWh to 6.9 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 8.5 kWh on June 30.

For the purposes of this report, the geographical coordinates of Cloverdale are 38.805 deg latitude, -123.017 deg longitude, and 335 ft elevation.

The topography within 2 miles of Cloverdale contains very significant variations in elevation, with a maximum elevation change of 1,237 feet and an average elevation above sea level of 518 feet. Within 10 miles contains very significant variations in elevation (3,474 feet). Within 50 miles also contains extreme variations in elevation (7,044 feet).

The area within 2 miles of Cloverdale is covered by artificial surfaces (26%), cropland (25%), trees (21%), and shrubs (19%), within 10 miles by shrubs (54%) and grassland (22%), and within 50 miles by shrubs (33%) and water (24%).