Sweet Grass Montana Climate Data

Monthly Average Climate Data for Sweet Grass Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.6 °F31.3 °F0.52 in.
February12.6 °F34.0 °F0.4 in.
March20.1 °F42.7 °F0.8 in.
April29.2 °F54.2 °F1.25 in.
May38.2 °F64.0 °F2.17 in.
June46.2 °F71.3 °F4.03 in.
July51.1 °F80.8 °F1.28 in.
August49.9 °F80.4 °F1.42 in.
September42.0 °F70.0 °F1.43 in.
October31.1 °F56.4 °F0.96 in.
November20.5 °F42.0 °F0.54 in.
December12.0 °F32.4 °F0.53 in.
Annual30.3 °F55 °F15.33 in.

Climate Data for Sweet Grass Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 11 - Jun. 20
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 ConditionsSevere Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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