Is this weather normal in Lyman County?

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

Weather › South Dakota › Lyman County

10 of the last 12 months ran warmer than usual in Lyman County. Lyman County has warmed about 0.4° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 54°, lows near 30°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +5.3°OctNov: +4.3°NovDec: +4.3°DecJan 2026: +2.0°JanFeb: +9.7°FebMar: +6.4°MarApr: -0.2°AprMay: +1.1°MayJun: -0.2°JunJul: +4.0°JulAug: +0.5°AugSep: +3.4°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: -1.1 inOctNov: +0.2 inNovDec: -0.1 inDecJan 2026: -0.2 inJanFeb: -0.6 inFebMar: -0.6 inMarApr: +0.2 inAprMay: -2.0 inMayJun: +1.5 inJunJul: +0.8 inJulAug: -0.3 inAugSep: +1.3 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 Lyman County

MonthUsual high / lowUsual rainWarmestColdest
January31° / 10°0.5 in35.5° 20060.4° 1937
February35° / 13°0.6 in39.5° 1954-4.4° 1936
March47° / 23°1.0 in49.2° 201216.3° 1899
April59° / 33°2.3 in54.2° 195537.3° 1920
May70° / 45°3.4 in70.2° 193449.8° 1907
June81° / 56°3.6 in79.1° 193360.2° 1945
July88° / 62°2.8 in86.0° 193665.9° 1992
August86° / 60°2.4 in79.9° 193765.9° 1915
September78° / 50°1.9 in70.5° 202452.2° 1965
October62° / 36°1.7 in58.6° 196337.9° 1925
November46° / 24°0.7 in43.7° 201614.7° 1896
December34° / 14°0.5 in32.1° 20233.5° 1983

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

Towns in Lyman County

Nearby counties