Is this weather normal in Harrison County?

Iowa · county records since 1895, through September 2026.

Weather › Iowa › Harrison County

8.0 inches fell in September, the 2nd-most for a September in Harrison County in 132 years. Harrison County just had its 4th-warmest September in 132 years, +6° against the usual.

This week

Usual for Oct 28 to Nov 3: highs near 56°, lows near 34°

That is the 1991 to 2020 average for these dates in Harrison 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: +3.4°NovDec: +1.7°DecJan 2026: +1.2°JanFeb: +8.7°FebMar: +6.6°MarApr: +2.7°AprMay: +0.3°MayJun: +0.3°JunJul: +2.5°JulAug: +0.6°AugSep: +5.7°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: -1.2 inOctNov: -0.1 inNovDec: -0.9 inDecJan 2026: +0.1 inJanFeb: -0.5 inFebMar: -1.1 inMarApr: +0.4 inAprMay: -1.3 inMayJun: -2.6 inJunJul: -1.0 inJulAug: +1.8 inAugSep: +4.7 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 Harrison County

MonthUsual high / lowUsual rainWarmestColdest
January31° / 12°0.7 in34.9° 20065.0° 1912
February36° / 17°0.9 in38.6° 20243.8° 1936
March49° / 28°1.8 in53.7° 201220.0° 1960
April62° / 38°3.3 in57.6° 192541.4° 1907
May73° / 50°4.8 in70.6° 193454.2° 1907
June82° / 60°4.9 in79.5° 193363.8° 1945
July85° / 64°3.7 in85.8° 193669.4° 1915
August83° / 62°4.2 in80.6° 193665.5° 1915
September77° / 53°3.3 in71.2° 193157.7° 1896
October64° / 40°2.4 in61.6° 196340.0° 1925
November48° / 28°1.4 in48.4° 200126.4° 1896
December35° / 17°1.2 in34.4° 20236.6° 1983

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

Towns in Harrison County

Crime Radar: Missouri Valley

Nearby counties