30-year climate normals

Custer County Climate and Weather Averages

Hottest month — July

95.2°

average daily high. The coldest month is January, averaging a low of 25.1°F.

Custer County gets 31.01" of precipitation a year, and 34% of it falls in Jul, Aug, Sep.

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	51.1°	25.1°	0.92"
February	55.2°	28.7°	1.23"
March	64.7°	37.9°	2.68"
April	73.8°	45.4°	2.63"
May	81.8°	56.3°	3.76"
June	90.6°	66.0°	3.63"
July	95.2°	70.3°	2.51"
August	94.3°	68.7°	4.16"
September	86.4°	61.5°	3.98"
October	74.8°	48.2°	2.28"
November	61.4°	36.4°	1.77"
December	51.2°	27.2°	1.46"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 34% falling in the wettest three months (Jul, Aug, Sep).

January 0.92"

February 1.23"

March 2.68"

April 2.63"

May 3.76"

June 3.63"

July 2.51"

August 4.16"

September 3.98"

October 2.28"

November 1.77"

December 1.46"

Annual total 31.01"

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 2,019

Heating degree days How much heating the climate demands 3,622

Approximate annual cooling cost At 13.38¢/kWh, Oklahoma average $270

Approximate annual electric heating cost Lower where heating is gas rather than electric $170

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 Custer County, where electricity is one line of eight.

Common questions

What is the weather like in Custer County?

Custer County averages a high of 95.2°F in July and a low of 25.1°F in January. Annual precipitation is 31.01 inches, with essentially no snow.

When is the rainy season in Custer County?

The wettest stretch is Jul, Aug, Sep, which accounts for 34% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Custer County?

The average daily high in July, the hottest month, is 95.2°F. That drives 2,019 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Custer County?

Effectively no. Measurable snowfall is rare in Custer County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CLINTON, OK US (USC00341909), 10 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, Oklahoma residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.