Shelby Montana Climate Data

Monthly Average Climate Data for Shelby Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.8 °F31.9 °F0.39 in.
February11.4 °F35.2 °F0.35 in.
March19.7 °F44.0 °F0.45 in.
April29.4 °F55.3 °F1.16 in.
May38.8 °F65.3 °F1.71 in.
June46.9 °F73.1 °F2.83 in.
July52.1 °F83.4 °F1.02 in.
August50.0 °F82.7 °F0.85 in.
September41.6 °F71.8 °F1.04 in.
October30.6 °F57.5 °F0.67 in.
November19.7 °F42.9 °F0.48 in.
December10.7 °F33.0 °F0.36 in.
Annual30 °F56.3 °F11.31 in.

Climate Data for Shelby Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateMay 21 - May 31
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 4a : -30°F to -25°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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