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United States › South Dakota › Brown County › Climate Station ABERDEEN, SD US Distance 9.7 mi Normals 1991–2020

30-year climate normals

Brown County Climate and Weather Averages

Hottest month — July

84.9°

average daily high. The coldest month is January, averaging a low of 1.9°F.

Brown County gets 21.82" of precipitation a year and 42.7" of snow, and 46% 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 23.7° 1.9° 0.55" 7.8"
February 28.6° 6.3° 0.62" 8.6"
March 41.7° 19.4° 0.89" 6.3"
April 57.6° 31.4° 1.91" 4.2"
May 70.4° 44.3° 3.28" 0.0"
June 80.2° 55.1° 3.76" 0.0"
July 84.9° 59.7° 3.09" 0.0"
August 82.9° 56.5° 2.24" 0.0"
September 74.9° 46.8° 1.99" 0.0"
October 59.3° 33.3° 2.14" 1.3"
November 42.5° 19.4° 0.74" 6.5"
December 28.7° 7.9° 0.61" 8.0"

Rainfall by month

Brown County has a distinct wet season. 46% of the year's precipitation arrives in May, Jun, Jul.

January 0.55"
February 0.62"
March 0.89"
April 1.91"
May 3.28"
June 3.76"
July 3.09"
August 2.24"
September 1.99"
October 2.14"
November 0.74"
December 0.61"
Annual total 21.82"

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 630
Heating degree days How much heating the climate demands 8,222
Approximate annual cooling cost At 15.73¢/kWh, South Dakota average $99
Approximate annual electric heating cost Lower where heating is gas rather than electric $453

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 Brown County, where electricity is one line of eight.

Common questions

What is the weather like in Brown County?

Brown County averages a high of 84.9°F in July and a low of 1.9°F in January. Annual precipitation is 21.82 inches, including 42.7 inches of snow.

When is the rainy season in Brown County?

The wettest stretch is May, Jun, Jul, which accounts for 46% 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 Brown County?

The average daily high in July, the hottest month, is 84.9°F. That drives 630 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Brown County?

Yes. Brown 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 ABERDEEN, SD US (USW00014929), 9.7 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, South Dakota residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.