30-year climate normals

Ventura County Climate and Weather Averages

Hottest month — September

79.6°

average daily high. The coldest month is December, averaging a low of 43.8°F.

Ventura County gets 12.01" of precipitation a year, and 65% of it falls in Jan, Feb, Mar.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	68.0°	45.0°	2.85"
February	67.6°	45.6°	2.90"
March	68.5°	47.4°	2.00"
April	71.0°	49.2°	0.64"
May	71.9°	52.7°	0.33"
June	74.7°	57.0°	0.13"
July	78.0°	60.3°	0.02"
August	79.5°	60.9°	0.00"
September	79.6°	59.4°	0.06"
October	76.4°	53.9°	0.50"
November	72.8°	48.6°	0.87"
December	67.7°	43.8°	1.71"

Rainfall by month

Ventura County has a distinct wet season. 65% of the year's precipitation arrives in Jan, Feb, Mar.

January 2.85"

February 2.90"

March 2.00"

April 0.64"

May 0.33"

June 0.13"

July 0.02"

August 0.00"

September 0.06"

October 0.50"

November 0.87"

December 1.71"

Annual total 12.01"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 643

Heating degree days How much heating the climate demands 1,551

Approximate annual cooling cost At 33.25¢/kWh, California average $214

Approximate annual electric heating cost Lower where heating is gas rather than electric $180

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Ventura County, where electricity is one line of eight.

Common questions

What is the weather like in Ventura County?

Ventura County averages a high of 79.6°F in September and a low of 43.8°F in December. Annual precipitation is 12.01 inches, with essentially no snow.

When is the rainy season in Ventura County?

The wettest stretch is Jan, Feb, Mar, which accounts for 65% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.

How hot does it get in Ventura County?

The average daily high in September, the hottest month, is 79.6°F. That drives 643 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Ventura County?

Effectively no. Measurable snowfall is rare in Ventura County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CAMARILLO AP, CA US (USW00023136), 10.2 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, California residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.