30-year climate normals

Fresno County Climate and Weather Averages

Hottest month — July

97.7°

average daily high. The coldest month is December, averaging a low of 39.8°F.

Fresno County gets 10.99" of precipitation a year, and 55% 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	55.4°	40.6°	2.16"
February	61.3°	43.3°	1.93"
March	67.5°	47.3°	1.90"
April	73.7°	50.9°	1.04"
May	82.7°	57.6°	0.42"
June	91.4°	63.9°	0.24"
July	97.7°	69.3°	0.03"
August	96.5°	67.9°	0.00"
September	90.7°	63.4°	0.05"
October	78.7°	54.6°	0.56"
November	64.9°	45.4°	0.87"
December	55.3°	39.8°	1.79"

Rainfall by month

Fresno County has a distinct wet season. 55% of the year's precipitation arrives in Jan, Feb, Mar.

January 2.16"

February 1.93"

March 1.90"

April 1.04"

May 0.42"

June 0.24"

July 0.03"

August 0.00"

September 0.05"

October 0.56"

November 0.87"

December 1.79"

Annual total 10.99"

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 2,209

Heating degree days How much heating the climate demands 2,187

Approximate annual cooling cost At 33.25¢/kWh, California average $734

Approximate annual electric heating cost Lower where heating is gas rather than electric $255

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 Fresno County, where electricity is one line of eight.

Common questions

What is the weather like in Fresno County?

Fresno County averages a high of 97.7°F in July and a low of 39.8°F in December. Annual precipitation is 10.99 inches, with essentially no snow.

When is the rainy season in Fresno County?

The wettest stretch is Jan, Feb, Mar, which accounts for 55% 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 Fresno County?

The average daily high in July, the hottest month, is 97.7°F. That drives 2,209 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Fresno County?

Effectively no. Measurable snowfall is rare in Fresno County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station FRESNO YOSEMITE INTL AP, CA US (USW00093193), 3.8 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.