Dillon Montana Climate Data

Monthly Average Climate Data for Dillon Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.5 °F34.1 °F0.3 in.
February15.8 °F37.5 °F0.35 in.
March22.6 °F46.3 °F0.59 in.
April28.9 °F54.9 °F1.39 in.
May36.7 °F64.4 °F1.89 in.
June43.2 °F72.9 °F1.91 in.
July48.4 °F83.8 °F0.94 in.
August46.4 °F82.4 °F0.9 in.
September39.7 °F72.1 °F0.88 in.
October30.4 °F58.0 °F1.01 in.
November21.4 °F43.4 °F0.51 in.
December13.4 °F33.1 °F0.46 in.
Annual30.1 °F56.9 °F11.13 in.

Climate Data for Dillon Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 21 - Jun. 30
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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