Is this weather normal in Pennington County?

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

Weather › South Dakota › Pennington County

Pennington County is in severe drought: NOAA's Palmer reading for September was -3.8. 11 of the last 12 months ran warmer than usual there.

This week

Usual for Oct 28 to Nov 3: highs near 53°, lows near 28°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +4.0°OctNov: +4.9°NovDec: +6.9°DecJan 2026: +3.2°JanFeb: +9.8°FebMar: +8.1°MarApr: +0.6°AprMay: +2.6°MayJun: 0.0°JunJul: +6.3°JulAug: +1.9°AugSep: +4.1°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: -0.3 inOctNov: -0.0 inNovDec: -0.1 inDecJan 2026: -0.1 inJanFeb: -0.5 inFebMar: -0.6 inMarApr: -0.7 inAprMay: -0.8 inMayJun: -0.8 inJunJul: +0.3 inJulAug: +0.3 inAugSep: +0.4 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 Pennington County

MonthUsual high / lowUsual rainWarmestColdest
January35° / 12°0.5 in35.3° 20063.0° 1937
February38° / 14°0.6 in38.7° 1954-1.0° 1936
March48° / 23°1.1 in47.2° 201216.5° 1899
April56° / 31°2.2 in51.2° 194634.0° 1920
May66° / 41°3.5 in65.9° 193446.5° 1907
June77° / 51°3.2 in74.3° 198856.0° 1945
July85° / 58°2.6 in81.6° 193662.6° 1915
August84° / 56°1.8 in75.9° 198363.1° 1915
September75° / 46°1.3 in68.5° 202448.4° 1965
October60° / 34°1.6 in56.8° 196335.2° 1925
November46° / 22°0.6 in43.4° 199916.4° 1985
December36° / 14°0.5 in32.7° 18965.9° 1983

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

Towns in Pennington County

Crime Radar: Rapid City, Box Elder

Nearby counties