30-year climate normals

Tehama County Climate and Weather Averages

Hottest month — July

98.0°

average daily high. The coldest month is December, averaging a low of 37.8°F.

Tehama County gets 23.12" 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°	38.2°	4.71"
February	60.8°	40.8°	4.15"
March	65.7°	43.7°	2.91"
April	71.9°	47.3°	1.55"
May	81.6°	54.5°	1.25"
June	90.8°	62.0°	0.44"
July	98.0°	66.0°	0.06"
August	96.2°	63.6°	0.05"
September	91.4°	59.3°	0.19"
October	79.0°	51.3°	1.04"
November	64.2°	42.6°	2.54"
December	55.7°	37.8°	4.23"

Rainfall by month

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

January 4.71"

February 4.15"

March 2.91"

April 1.55"

May 1.25"

June 0.44"

July 0.06"

August 0.05"

September 0.19"

October 1.04"

November 2.54"

December 4.23"

Annual total 23.12"

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 1,926

Heating degree days How much heating the climate demands 2,525

Approximate annual cooling cost At 33.25¢/kWh, California average $640

Approximate annual electric heating cost Lower where heating is gas rather than electric $294

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 Tehama County, where electricity is one line of eight.

Common questions

What is the weather like in Tehama County?

Tehama County averages a high of 98.0°F in July and a low of 37.8°F in December. Annual precipitation is 23.12 inches, with essentially no snow.

When is the rainy season in Tehama 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 Tehama County?

The average daily high in July, the hottest month, is 98.0°F. That drives 1,926 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Tehama County?

Effectively no. Measurable snowfall is rare in Tehama County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station RED BLUFF MUNI AP, CA US (USW00024216), 2.1 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.