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Average Weather in Ventura California, United States

In Ventura, the summers are warm, arid, and clear and the winters are long, cool, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 46°F to 76°F and is rarely below 39°F or above 82°F.

Temperature

The warm season lasts for 3.5 months, from June 27 to October 11, with an average daily high temperature above 73°F. The hottest day of the year is August 24, with an average high of 76°F and low of 61°F.

The cool season lasts for 4.2 months, from November 30 to April 7, with an average daily high temperature below 66°F. The coldest day of the year is December 25, with an average low of 46°F and high of 64°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in VenturaJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablecoldcoolwarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Ventura, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Ventura begins around April 25 and lasts for 6.3 months, ending around November 3. On September 7, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 91% of the time, and overcast or mostly cloudy 9% of the time.

The cloudier part of the year begins around November 3 and lasts for 5.7 months, ending around April 25. On February 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 44% of the time, and clear, mostly clear, or partly cloudy 56% of the time.

Cloud Cover Categories

Cloud Cover Categories in VenturaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 791%Sep 791%Feb 2056%Feb 2056%Apr 2573%Apr 2573%Nov 374%Nov 374%clearovercastmostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Ventura varies throughout the year.

The wetter season lasts 4.0 months, from November 22 to March 23, with a greater than 11% chance of a given day being a wet day. The chance of a wet day peaks at 22% on February 20.

The drier season lasts 8.0 months, from March 23 to November 22. The smallest chance of a wet day is 0% on July 29.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 22% on February 20.

Daily Chance of Precipitation

Daily Chance of Precipitation in VenturawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 2022%Feb 2022%Jul 290%Jul 290%Jan 118%Jan 118%Nov 2211%Nov 2211%Mar 2311%Mar 2311%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Ventura experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.5 months, from October 12 to April 29, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 18, with an average total accumulation of 3.7 inches.

The rainless period of the year lasts for 5.5 months, from April 29 to October 12. The least rain falls around July 6, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Ventura varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 52 minutes of daylight; the longest day is June 20, with 14 hours, 27 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:44 AM on June 12, and the latest sunrise is 1 hour, 36 minutes later at 7:20 AM on November 4. The earliest sunset is at 4:47 PM on December 5, and the latest sunset is 3 hours, 26 minutes later at 8:13 PM on June 28.

Daylight saving time (DST) is observed in Ventura during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in VenturaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:44 AMJun 125:44 AM8:13 PMJun 288:13 PMJun 28Dec 54:47 PMDec 54:47 PM7:20 AMNov 47:20 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 perceived humidity level in Ventura, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 1% of 1% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in VenturaJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Mar 140%Mar 140%Sep 162%Sep 162%drydryhumidhumidcomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Ventura experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.3 months, from October 25 to June 3, with average wind speeds of more than 6.1 miles per hour. The windiest day of the year is December 29, with an average hourly wind speed of 7.7 miles per hour.

The calmer time of year lasts for 4.7 months, from June 3 to October 25. The calmest day of the year is August 6, with an average hourly wind speed of 4.6 miles per hour.

Average Wind Speed

Average Wind Speed in VenturawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mph12 mphDec 297.7 mphDec 297.7 mphAug 64.6 mphAug 64.6 mphOct 256.1 mphOct 256.1 mphJun 36.1 mphJun 36.1 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Ventura varies throughout the year.

The wind is most often from the west for 4.8 months, from May 2 to September 25, with a peak percentage of 48% on June 10. The wind is most often from the north for 7.3 months, from September 25 to May 2, with a peak percentage of 46% on January 1.

Wind Direction

Wind Direction in VenturaNWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnortheastsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Ventura 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from July 7 to October 25, with an average temperature above 64°F. The day of the year with the warmest water is August 18, with an average temperature of 66°F.

The time of year with cooler water lasts for 5.0 months, from December 17 to May 17, with an average temperature below 59°F. The day of the year with the coolest water is April 4, with an average temperature of 57°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.9 months, from April 26 to August 22, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest day of the year is June 18, with an average of 8.6 kWh.

The darker period of the year lasts for 3.2 months, from November 6 to February 13, with an average daily incident shortwave energy per square meter below 4.0 kWh. The darkest day of the year is December 26, with an average of 2.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in VenturabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJun 188.6 kWhJun 188.6 kWhDec 262.9 kWhDec 262.9 kWhApr 267.4 kWhApr 267.4 kWhAug 227.4 kWhAug 227.4 kWhNov 64.0 kWhNov 64.0 kWhFeb 134.0 kWhFeb 134.0 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Ventura are 34.278 deg latitude, -119.293 deg longitude, and 56 ft elevation.

The topography within 2 miles of Ventura contains very significant variations in elevation, with a maximum elevation change of 1,142 feet and an average elevation above sea level of 134 feet. Within 10 miles contains very significant variations in elevation (2,595 feet). Within 50 miles contains large variations in elevation (8,822 feet).

The area within 2 miles of Ventura is covered by artificial surfaces (49%), water (30%), and grassland (10%), within 10 miles by water (41%) and shrubs (20%), and within 50 miles by water (45%) and shrubs (32%).

Data Sources

This report illustrates the typical weather in Ventura, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Ventura.

For each station, the records are corrected for the elevation difference between that station and Ventura 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 Ventura is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ventura and a given station.

The stations contributing to this reconstruction are: Oxnard Airport (91%, 12 kilometers, southeast) and Santa Barbara Municipal Airport (9%, 53 kilometers, west).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.