Fallon Montana Climate Data

Monthly Average Climate Data for Fallon Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January5.6 °F29.4 °F0.28 in.
February9.7 °F34.3 °F0.31 in.
March20.1 °F46.1 °F0.52 in.
April31.1 °F58.4 °F1.44 in.
May41.4 °F68.6 °F2.63 in.
June51.2 °F78.5 °F2.45 in.
July57.0 °F88.3 °F2.0 in.
August54.7 °F87.6 °F1.25 in.
September44.1 °F76.8 °F1.27 in.
October32.4 °F60.5 °F1.01 in.
November19.5 °F44.9 °F0.37 in.
December9.2 °F32.9 °F0.32 in.
Annual31.3 °F58.9 °F13.85 in.

Climate Data for Fallon Montana

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 3b : -35°F to -30°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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