Is this weather normal in Bonneville County?

Idaho · county records since 1895, through September 2026.

Weather › Idaho › Bonneville County

Every one of the last 12 months ran warmer than usual in Bonneville County. Only 1 of Idaho's 44 counties ran further above their usual September than Bonneville County.

This week

Usual for Oct 28 to Nov 3: highs near 47°, lows near 26°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +0.9°OctNov: +8.2°NovDec: +10.9°DecJan 2026: +4.5°JanFeb: +8.7°FebMar: +9.4°MarApr: +0.6°AprMay: +2.1°MayJun: +0.3°JunJul: +5.8°JulAug: +3.2°AugSep: +2.0°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: -1.2 inNovDec: +2.1 inDecJan 2026: -0.7 inJanFeb: -0.1 inFebMar: -1.2 inMarApr: +0.1 inAprMay: -0.6 inMayJun: -0.7 inJunJul: -0.3 inJulAug: +0.4 inAugSep: +0.6 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 Bonneville County

MonthUsual high / lowUsual rainWarmestColdest
January30° / 14°2.4 in31.8° 19534.8° 1937
February34° / 16°1.8 in33.8° 193410.0° 1903
March43° / 23°1.9 in42.5° 202617.9° 1917
April52° / 29°2.0 in47.5° 193431.8° 1975
May62° / 37°2.3 in55.6° 193443.2° 1896
June71° / 43°1.7 in64.1° 202151.0° 1908
July81° / 50°0.8 in71.2° 200755.6° 1993
August80° / 49°1.1 in67.9° 200158.2° 1899
September70° / 41°1.4 in60.6° 199045.8° 1912
October55° / 31°1.7 in50.2° 198834.5° 2019
November40° / 22°1.9 in38.8° 202522.3° 2000
December29° / 14°2.4 in32.9° 191711.3° 1909

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

Towns in Bonneville County

Crime Radar: Idaho Falls

Nearby counties