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United States › Wyoming › Natrona County › Climate Station CASPER NATRONA CO AP, WY US Distance 16.4 mi Normals 1991–2020

30-year climate normals

Natrona County Climate and Weather Averages

Hottest month — July

89.0°

average daily high. The coldest month is December, averaging a low of 14.8°F.

Natrona County gets 12.22" of precipitation a year and 71.8" of snow, and 41% of it falls in Apr, May, Jun.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 35.2° 15.0° 0.49" 9.0"
February 37.8° 15.4° 0.56" 10.9"
March 48.8° 22.7° 0.84" 10.3"
April 56.3° 28.2° 1.41" 10.5"
May 66.8° 37.1° 2.21" 2.6"
June 79.6° 45.4° 1.34" 0.1"
July 89.0° 53.0° 1.19" 0.0"
August 86.7° 51.4° 0.79" 0.0"
September 75.6° 42.2° 0.95" 1.5"
October 59.7° 30.9° 1.19" 7.0"
November 45.9° 22.0° 0.64" 8.9"
December 34.7° 14.8° 0.61" 11.0"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 41% falling in the wettest three months (Apr, May, Jun).

January 0.49"
February 0.56"
March 0.84"
April 1.41"
May 2.21"
June 1.34"
July 1.19"
August 0.79"
September 0.95"
October 1.19"
November 0.64"
December 0.61"
Annual total 12.22"

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 443
Heating degree days How much heating the climate demands 7,485
Approximate annual cooling cost At 14.8¢/kWh, Wyoming average $66
Approximate annual electric heating cost Lower where heating is gas rather than electric $388

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 Natrona County, where electricity is one line of eight.

Common questions

What is the weather like in Natrona County?

Natrona County averages a high of 89.0°F in July and a low of 14.8°F in December. Annual precipitation is 12.22 inches, including 71.8 inches of snow.

When is the rainy season in Natrona County?

The wettest stretch is Apr, May, Jun, which accounts for 41% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Natrona County?

The average daily high in July, the hottest month, is 89.0°F. That drives 443 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Natrona County?

Yes. Natrona County averages 71.8 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station CASPER NATRONA CO AP, WY US (USW00024089), 16.4 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, Wyoming residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.