30-year climate normals

Sacramento County Climate and Weather Averages

Hottest month — July

94.4°

average daily high. The coldest month is December, averaging a low of 40.7°F.

Sacramento County gets 19.2" of precipitation a year, and 57% of it falls in Dec, Jan, Feb.

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	56.5°	41.1°	3.87"
February	62.2°	43.7°	3.63"
March	67.8°	46.7°	2.82"
April	73.5°	49.3°	1.44"
May	81.3°	54.0°	0.86"
June	89.0°	58.7°	0.21"
July	94.4°	61.4°	0.00"
August	93.5°	61.0°	0.02"
September	89.3°	58.8°	0.15"
October	78.9°	52.9°	0.93"
November	65.3°	45.3°	1.78"
December	56.4°	40.7°	3.49"

Rainfall by month

Sacramento County has a distinct wet season. 57% of the year's precipitation arrives in Dec, Jan, Feb.

January 3.87"

February 3.63"

March 2.82"

April 1.44"

May 0.86"

June 0.21"

July 0.00"

August 0.02"

September 0.15"

October 0.93"

November 1.78"

December 3.49"

Annual total 19.2"

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 1,576

Heating degree days How much heating the climate demands 2,139

Approximate annual cooling cost At 33.25¢/kWh, California average $524

Approximate annual electric heating cost Lower where heating is gas rather than electric $249

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 Sacramento County, where electricity is one line of eight.

Common questions

What is the weather like in Sacramento County?

Sacramento County averages a high of 94.4°F in July and a low of 40.7°F in December. Annual precipitation is 19.2 inches, with essentially no snow.

When is the rainy season in Sacramento County?

The wettest stretch is Dec, Jan, Feb, which accounts for 57% 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 Sacramento County?

The average daily high in July, the hottest month, is 94.4°F. That drives 1,576 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Sacramento County?

Effectively no. Measurable snowfall is rare in Sacramento County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station SACRAMENTO 5 ESE, CA US (USW00023271), 8.3 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.