Harlem Montana Climate Data

Monthly Average Climate Data for Harlem Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January4.8 °F27.2 °F0.42 in.
February7.9 °F31.8 °F0.35 in.
March18.6 °F43.7 °F0.42 in.
April29.9 °F57.7 °F1.05 in.
May39.7 °F67.8 °F2.0 in.
June48.8 °F76.0 °F2.77 in.
July54.2 °F85.6 °F1.59 in.
August52.1 °F85.2 °F0.97 in.
September42.0 °F73.7 °F1.11 in.
October30.3 °F58.2 °F0.68 in.
November17.9 °F42.7 °F0.5 in.
December8.2 °F31.1 °F0.35 in.
Annual29.5 °F56.7 °F12.21 in.

Climate Data for Harlem 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 3b : -35°F to -30°F
Plant Hardiness Zone - 2012Zone 3b : -35°F to -30°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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