Is this weather normal in Lemhi County?

Idaho · county records since 1895, through September 2026.

Weather › Idaho › Lemhi County

10 of the last 12 months ran warmer than usual in Lemhi County. Lemhi County has warmed about 0.5° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 44°, lows near 24°

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

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usual high for the datewarmercooler

The last 12 months

Oct: -0.2°OctNov: +7.2°NovDec: +8.2°DecJan 2026: +3.3°JanFeb: +6.4°FebMar: +5.9°MarApr: +0.2°AprMay: +2.6°MayJun: +0.2°JunJul: +4.2°JulAug: +2.6°AugSep: -0.8°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: +0.2 inOctNov: -0.9 inNovDec: +2.2 inDecJan 2026: -1.1 inJanFeb: -0.0 inFebMar: +0.0 inMarApr: +0.2 inAprMay: -1.3 inMayJun: +0.1 inJunJul: -0.0 inJulAug: +0.4 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 Lemhi County

MonthUsual high / lowUsual rainWarmestColdest
January30° / 13°1.9 in31.8° 1953-1.6° 1949
February34° / 14°1.6 in32.4° 196311.0° 1933
March42° / 20°1.8 in37.2° 199218.8° 1917
April49° / 26°2.1 in44.3° 193429.9° 1975
May58° / 34°2.3 in52.4° 189738.2° 1916
June66° / 40°2.3 in61.2° 202147.5° 1908
July78° / 47°1.0 in68.2° 200751.4° 1993
August76° / 46°0.9 in64.9° 202254.3° 1900
September66° / 39°1.3 in57.4° 199043.5° 1965
October51° / 29°1.7 in47.7° 198831.7° 2019
November37° / 20°1.9 in35.2° 202518.8° 1985
December28° / 13°2.1 in32.1° 19179.7° 1948

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

Towns in Lemhi County

Crime Radar: Salmon

Nearby counties