Is this weather normal in Washington County?

Idaho · county records since 1895, through September 2026.

Weather › Idaho › Washington County

Washington County is in severe drought: NOAA's Palmer reading for September was -3.1. 10 of the last 12 months ran warmer than usual there.

This week

Usual for Oct 28 to Nov 3: highs near 52°, lows near 33°

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

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usual high for the datewarmercooler

The last 12 months

Oct: -0.5°OctNov: +6.1°NovDec: +8.4°DecJan 2026: +3.4°JanFeb: +5.4°FebMar: +4.6°MarApr: +0.8°AprMay: +3.9°MayJun: +1.0°JunJul: +3.6°JulAug: +2.4°AugSep: -1.8°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: +0.4 inOctNov: -1.0 inNovDec: +0.6 inDecJan 2026: -1.1 inJanFeb: -0.0 inFebMar: -1.1 inMarApr: +2.3 inAprMay: -1.8 inMayJun: -0.4 inJunJul: -0.2 inJulAug: -0.1 inAugSep: +0.5 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 Washington County

MonthUsual high / lowUsual rainWarmestColdest
January34° / 21°2.8 in36.8° 19534.9° 1949
February40° / 24°2.0 in40.3° 196316.4° 1933
March50° / 30°2.3 in46.4° 199226.5° 1917
April57° / 35°1.8 in53.0° 193439.8° 1970
May67° / 42°2.1 in60.8° 199248.3° 2010
June76° / 49°1.4 in71.1° 201556.6° 1901
July88° / 57°0.4 in78.8° 200761.1° 1993
August86° / 56°0.4 in76.7° 202262.4° 1899
September76° / 47°0.7 in68.0° 199053.6° 1912
October60° / 37°1.3 in56.5° 198840.8° 2019
November44° / 28°2.2 in42.0° 202525.9° 1985
December34° / 22°3.3 in37.7° 191713.4° 1985

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

Towns in Washington County

Crime Radar: Weiser

Nearby counties