30-year climate normals

Placer County Climate and Weather Averages

Hottest month — July

77.8°

average daily high. The coldest month is February, averaging a low of 33.1°F.

Placer County gets 62.44" of precipitation a year, and 50% 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	46.5°	34.4°	10.55"
February	45.0°	33.1°	10.06"
March	48.2°	34.7°	8.95"
April	52.0°	37.5°	5.11"
May	60.6°	45.6°	4.11"
June	69.8°	54.4°	1.14"
July	77.8°	62.7°	0.04"
August	77.4°	62.1°	0.20"
September	72.9°	57.2°	0.59"
October	62.9°	48.1°	3.59"
November	51.2°	39.0°	7.20"
December	44.8°	33.6°	10.90"

Rainfall by month

Placer County has a distinct wet season. 50% of the year's precipitation arrives in Dec, Jan, Feb.

January 10.55"

February 10.06"

March 8.95"

April 5.11"

May 4.11"

June 1.14"

July 0.04"

August 0.20"

September 0.59"

October 3.59"

November 7.20"

December 10.90"

Annual total 62.44"

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 552

Heating degree days How much heating the climate demands 5,213

Approximate annual cooling cost At 33.25¢/kWh, California average $184

Approximate annual electric heating cost Lower where heating is gas rather than electric $607

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 Placer County, where electricity is one line of eight.

Common questions

What is the weather like in Placer County?

Placer County averages a high of 77.8°F in July and a low of 33.1°F in February. Annual precipitation is 62.44 inches, with essentially no snow.

When is the rainy season in Placer County?

The wettest stretch is Dec, Jan, Feb, which accounts for 50% 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 Placer County?

The average daily high in July, the hottest month, is 77.8°F. That drives 552 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Placer County?

Effectively no. Measurable snowfall is rare in Placer County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station BLUE CANYON AP, CA US (USW00023225), 14.9 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.