Sun River Montana Climate Data

Monthly Average Climate Data for Sun River Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.8 °F36.5 °F0.38 in.
February15.9 °F38.7 °F0.47 in.
March22.4 °F46.8 °F0.56 in.
April30.8 °F56.7 °F1.54 in.
May39.4 °F65.9 °F2.03 in.
June47.0 °F73.7 °F2.73 in.
July52.0 °F84.7 °F1.1 in.
August50.5 °F83.7 °F1.11 in.
September43.1 °F73.2 °F1.17 in.
October33.8 °F59.3 °F0.86 in.
November24.2 °F45.6 °F0.54 in.
December16.7 °F37.0 °F0.38 in.
Annual32.6 °F58.5 °F12.87 in.

Climate Data for Sun River Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 4a : -30°F to -25°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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