Is this weather normal in Custer County?

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

Weather › South Dakota › Custer County

Custer County is in extreme drought: NOAA's Palmer reading for September was -5.7. Every one 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 Custer County. The Weather Service forecast fills in below.

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usual high for the datewarmercooler

The last 12 months

Oct: +3.8°OctNov: +5.1°NovDec: +7.9°DecJan 2026: +3.4°JanFeb: +8.9°FebMar: +8.8°MarApr: +1.0°AprMay: +2.5°MayJun: +0.1°JunJul: +6.2°JulAug: +3.0°AugSep: +4.2°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: -0.2 inOctNov: 0.0 inNovDec: -0.2 inDecJan 2026: -0.3 inJanFeb: -0.5 inFebMar: -0.7 inMarApr: -0.7 inAprMay: -1.1 inMayJun: -1.2 inJunJul: -0.4 inJulAug: +0.1 inAugSep: +1.0 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 Custer County

MonthUsual high / lowUsual rainWarmestColdest
January37° / 14°0.4 in34.6° 20065.5° 1937
February38° / 15°0.6 in38.3° 19542.8° 1936
March48° / 23°1.0 in46.4° 201218.3° 1899
April56° / 31°2.1 in50.2° 194633.1° 1920
May65° / 41°3.4 in63.9° 193445.9° 1907
June76° / 50°3.1 in72.6° 198855.4° 1945
July84° / 57°2.8 in79.0° 193661.3° 1915
August83° / 55°2.0 in74.7° 193762.5° 1915
September74° / 46°1.4 in67.1° 202446.7° 1965
October59° / 33°1.4 in55.6° 196335.1° 1925
November46° / 23°0.6 in44.1° 199917.5° 1985
December37° / 15°0.5 in34.0° 20257.7° 1983

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

Towns in Custer County

Nearby counties