Is this weather normal in Grant County?

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

Weather › South Dakota › Grant County

10 of the last 12 months ran warmer than usual in Grant County. Grant County just had its 8th-warmest September in 132 years, +4° against the usual.

This week

Usual for Oct 28 to Nov 3: highs near 48°, lows near 29°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +6.3°OctNov: +4.5°NovDec: -0.4°DecJan 2026: +0.4°JanFeb: +8.9°FebMar: +5.1°MarApr: -0.4°AprMay: +0.8°MayJun: +0.8°JunJul: +3.5°JulAug: +0.7°AugSep: +4.4°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: -1.3 inOctNov: -0.1 inNovDec: -0.2 inDecJan 2026: -0.5 inJanFeb: -0.2 inFebMar: -0.6 inMarApr: -0.3 inAprMay: -1.6 inMayJun: -1.4 inJunJul: +2.1 inJulAug: -2.4 inAugSep: +0.9 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 Grant County

MonthUsual high / lowUsual rainWarmestColdest
January21° / 3°0.7 in25.6° 2006-4.2° 1912
February26° / 7°0.7 in30.9° 1987-7.8° 1936
March39° / 20°1.2 in43.5° 201213.6° 1899
April54° / 32°2.5 in52.0° 191533.2° 2013
May68° / 45°3.2 in67.5° 193445.4° 1907
June77° / 56°4.0 in75.0° 193359.0° 1969
July82° / 60°3.8 in80.3° 193662.8° 1992
August80° / 58°2.9 in75.4° 198363.3° 1915
September72° / 49°2.6 in66.4° 202448.4° 1965
October57° / 36°2.4 in56.0° 196334.4° 1925
November40° / 22°1.0 in41.8° 200114.0° 1896
December26° / 10°0.8 in30.8° 2023-1.1° 1983

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

Towns in Grant County

Nearby counties