Is this weather normal in Corson County?

South Dakota · county records since 1895, through September 2026.

Weather › South Dakota › Corson County

10 of the last 12 months ran warmer than usual in Corson County. 3.6 inches fell in September, the 7th-most for a September there in 132 years.

This week

Usual for Oct 28 to Nov 3: highs near 49°, lows near 26°

That is the 1991 to 2020 average for these dates in Corson County. The Weather Service forecast fills in below.

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usual high for the datewarmercooler

The last 12 months

Oct: +4.8°OctNov: +3.6°NovDec: +1.7°DecJan 2026: +2.4°JanFeb: +11.0°FebMar: +6.9°MarApr: -1.2°AprMay: +1.8°MayJun: -0.7°JunJul: +5.9°JulAug: +1.1°AugSep: +3.7°Sepwarmercooler

Each bar is a month's average temperature against the usual for that month (1991 to 2020). Ranks compare the same month in every year since 1895.

Every year since 1895

18952025

Rain and drought

Oct: +0.4 inOctNov: +0.2 inNovDec: +0.1 inDecJan 2026: -0.2 inJanFeb: -0.2 inFebMar: -0.5 inMarApr: +0.0 inAprMay: -1.4 inMayJun: -0.9 inJunJul: -1.3 inJulAug: +0.4 inAugSep: +2.1 inSepwetterdrier

Rain and melted snow against the usual for each month. The drought reading is NOAA's Palmer index for the county.

Month by month in Corson County

MonthUsual high / lowUsual rainWarmestColdest
January26° / 6°0.4 in29.1° 2006-6.6° 1937
February30° / 9°0.6 in35.8° 1954-9.9° 1936
March43° / 20°0.8 in45.0° 20129.6° 1899
April56° / 31°1.6 in52.7° 191534.3° 1950
May68° / 42°2.9 in67.3° 193446.7° 1907
June78° / 53°3.3 in76.2° 198858.1° 1945
July85° / 58°2.7 in84.8° 193663.5° 1992
August84° / 56°2.0 in77.2° 193764.2° 1923
September74° / 46°1.5 in68.0° 202447.3° 1965
October58° / 33°1.6 in56.8° 196335.3° 1925
November42° / 20°0.5 in40.5° 19499.8° 1896
December29° / 10°0.5 in29.5° 2023-1.1° 1927

Warmest and coldest are the month's whole-month average temperature, with the year it happened.

Towns in Corson County

Nearby counties