Darby Montana Climate Data

Monthly Average Climate Data for Darby Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.8 °F35.9 °F1.13 in.
February19.5 °F40.8 °F1.07 in.
March25.3 °F49.7 °F0.99 in.
April30.5 °F57.0 °F1.2 in.
May37.3 °F66.5 °F1.73 in.
June43.5 °F74.1 °F2.19 in.
July48.1 °F85.1 °F0.93 in.
August46.4 °F84.1 °F0.94 in.
September39.6 °F74.1 °F1.09 in.
October31.3 °F59.0 °F1.36 in.
November23.6 °F43.8 °F1.36 in.
December17.3 °F34.4 °F1.39 in.
Annual31.7 °F58.7 °F15.38 in.

Climate Data for Darby Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 11 - Jun. 20
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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