30-year climate normals

Mariposa County Climate and Weather Averages

Hottest month — August

74.9°

average daily high. The coldest month is February, averaging a low of 30.5°F.

Mariposa County gets 40.44" 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	43.7°	31.9°	6.86"
February	41.8°	30.5°	5.63"
March	44.7°	31.9°	5.81"
April	48.7°	35.6°	3.68"
May	57.7°	42.8°	2.40"
June	67.0°	52.0°	0.76"
July	74.8°	60.1°	0.29"
August	74.9°	59.1°	0.05"
September	70.4°	54.0°	0.66"
October	60.4°	45.7°	2.28"
November	49.4°	37.1°	4.37"
December	42.7°	32.1°	7.65"

Rainfall by month

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

January 6.86"

February 5.63"

March 5.81"

April 3.68"

May 2.40"

June 0.76"

July 0.29"

August 0.05"

September 0.66"

October 2.28"

November 4.37"

December 7.65"

Annual total 40.44"

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 308

Heating degree days How much heating the climate demands 5,919

Approximate annual cooling cost At 33.25¢/kWh, California average $102

Approximate annual electric heating cost Lower where heating is gas rather than electric $689

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 Mariposa County, where electricity is one line of eight.

Common questions

What is the weather like in Mariposa County?

Mariposa County averages a high of 74.9°F in August and a low of 30.5°F in February. Annual precipitation is 40.44 inches, with essentially no snow.

When is the rainy season in Mariposa 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 Mariposa County?

The average daily high in August, the hottest month, is 74.9°F. That drives 308 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Mariposa County?

Effectively no. Measurable snowfall is rare in Mariposa County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station YOSEMITE VILLAGE 12 W, CA US (USW00053150), 13.7 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.