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United States › North Dakota › McLean County › Climate Station GARRISON, ND US Distance 0.1 mi Normals 1991–2020

30-year climate normals

McLean County Climate and Weather Averages

Hottest month — July

81.3°

average daily high. The coldest month is January, averaging a low of 1.6°F.

McLean County gets 18.18" of precipitation a year and 42.7" of snow, and 51% of it falls in May, Jun, Jul.

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 19.5° 1.6° 0.43" 6.8"
February 24.3° 5.1° 0.36" 6.2"
March 36.7° 17.2° 0.67" 7.4"
April 52.8° 29.7° 1.23" 2.9"
May 65.8° 42.4° 2.82" 1.3"
June 74.5° 53.1° 3.78" 0.0"
July 81.3° 58.3° 2.73" 0.0"
August 81.2° 55.9° 2.11" 0.0"
September 71.3° 46.4° 1.68" 0.0"
October 55.0° 33.1° 1.29" 2.5"
November 37.9° 19.9° 0.63" 5.7"
December 25.0° 8.5° 0.45" 9.9"

Rainfall by month

McLean County has a distinct wet season. 51% of the year's precipitation arrives in May, Jun, Jul.

January 0.43"
February 0.36"
March 0.67"
April 1.23"
May 2.82"
June 3.78"
July 2.73"
August 2.11"
September 1.68"
October 1.29"
November 0.63"
December 0.45"
Annual total 18.18"

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 441
Heating degree days How much heating the climate demands 8,957
Approximate annual cooling cost At 13.61¢/kWh, North Dakota average $60
Approximate annual electric heating cost Lower where heating is gas rather than electric $427

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 McLean County, where electricity is one line of eight.

Common questions

What is the weather like in McLean County?

McLean County averages a high of 81.3°F in July and a low of 1.6°F in January. Annual precipitation is 18.18 inches, including 42.7 inches of snow.

When is the rainy season in McLean County?

The wettest stretch is May, Jun, Jul, which accounts for 51% 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 McLean County?

The average daily high in July, the hottest month, is 81.3°F. That drives 441 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in McLean County?

Yes. McLean County averages 42.7 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station GARRISON, ND US (USC00323376), 0.1 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, North Dakota residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.