Plains Montana Climate Data

Monthly Average Climate Data for Plains Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.8 °F36.0 °F1.38 in.
February22.9 °F40.8 °F1.19 in.
March27.0 °F50.2 °F1.13 in.
April32.5 °F59.1 °F1.6 in.
May39.4 °F69.1 °F1.55 in.
June46.2 °F76.2 °F1.93 in.
July51.0 °F87.7 °F0.67 in.
August50.1 °F87.7 °F0.65 in.
September43.0 °F76.3 °F1.05 in.
October33.9 °F59.2 °F1.61 in.
November27.1 °F43.5 °F1.57 in.
December22.4 °F35.1 °F1.37 in.
Annual34.8 °F60.1 °F15.7 in.

Climate Data for Plains Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year