Corvallis Montana Climate Data

Monthly Average Climate Data for Corvallis Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.6 °F35.7 °F0.8 in.
February20.5 °F40.6 °F0.73 in.
March25.8 °F50.0 °F0.77 in.
April31.2 °F58.2 °F0.99 in.
May38.1 °F67.5 °F1.56 in.
June44.5 °F74.8 °F1.52 in.
July49.2 °F86.0 °F0.82 in.
August47.6 °F84.8 °F0.85 in.
September40.4 °F74.3 °F0.89 in.
October31.7 °F59.2 °F0.81 in.
November23.9 °F43.3 °F0.99 in.
December18.3 °F34.3 °F1.04 in.
Annual32.5 °F59.1 °F11.77 in.

Climate Data for Corvallis 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 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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