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United States › South Dakota › Fall River County › Climate Station OELRICHS, SD US Distance 14.1 mi Normals 1991–2020

30-year climate normals

Fall River County Climate and Weather Averages

Hottest month — July

88.9°

average daily high. The coldest month is January, averaging a low of 12.9°F.

Fall River County gets 17.85" of precipitation a year and 43.8" of snow, and 48% 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 35.8° 12.9° 0.41" 6.2"
February 39.7° 14.4° 0.50" 7.3"
March 50.9° 22.7° 1.02" 7.1"
April 59.5° 30.7° 2.04" 5.3"
May 68.9° 41.4° 3.25" 0.3"
June 79.9° 51.4° 3.35" 0.0"
July 88.9° 58.0° 2.00" 0.0"
August 88.2° 55.9° 1.54" 0.0"
September 78.9° 46.1° 1.40" 0.2"
October 63.0° 33.1° 1.35" 3.6"
November 48.4° 22.0° 0.58" 5.5"
December 37.0° 13.8° 0.41" 8.3"

Rainfall by month

Fall River County has a distinct wet season. 48% of the year's precipitation arrives in Apr, May, Jun.

January 0.41"
February 0.50"
March 1.02"
April 2.04"
May 3.25"
June 3.35"
July 2.00"
August 1.54"
September 1.40"
October 1.35"
November 0.58"
December 0.41"
Annual total 17.85"

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 694
Heating degree days How much heating the climate demands 7,015
Approximate annual cooling cost At 15.73¢/kWh, South Dakota average $109
Approximate annual electric heating cost Lower where heating is gas rather than electric $386

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 Fall River County, where electricity is one line of eight.

Common questions

What is the weather like in Fall River County?

Fall River County averages a high of 88.9°F in July and a low of 12.9°F in January. Annual precipitation is 17.85 inches, including 43.8 inches of snow.

When is the rainy season in Fall River County?

The wettest stretch is Apr, May, Jun, which accounts for 48% 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 Fall River County?

The average daily high in July, the hottest month, is 88.9°F. That drives 694 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Fall River County?

Yes. Fall River County averages 43.8 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station OELRICHS, SD US (USC00396212), 14.1 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, South Dakota residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.