American Falls Idaho Climate Data

Monthly Average Climate Data for American Falls Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F34.1 °F1.04 in.
February20.1 °F39.1 °F0.73 in.
March27.5 °F50.4 °F1.18 in.
April32.6 °F59.4 °F1.33 in.
May40.2 °F69.0 °F1.38 in.
June46.7 °F78.3 °F1.01 in.
July53.0 °F88.8 °F0.34 in.
August51.5 °F87.5 °F0.52 in.
September43.1 °F77.3 °F0.8 in.
October33.5 °F62.3 °F0.96 in.
November24.5 °F46.5 °F0.89 in.
December17.7 °F34.9 °F0.99 in.
Annual34 °F60.6 °F11.17 in.

Climate Data for American Falls Idaho

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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