Big Arm Montana Climate Data

Monthly Average Climate Data for Big Arm Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.1 °F33.9 °F1.15 in.
February20.8 °F37.3 °F0.93 in.
March26.1 °F46.4 °F1.02 in.
April32.1 °F55.9 °F1.44 in.
May39.6 °F65.4 °F1.63 in.
June46.1 °F71.9 °F2.55 in.
July51.0 °F83.2 °F1.31 in.
August49.9 °F83.3 °F0.62 in.
September42.6 °F72.4 °F1.15 in.
October33.5 °F56.4 °F1.39 in.
November26.4 °F41.8 °F1.44 in.
December20.8 °F33.6 °F1.02 in.
Annual34.1 °F56.8 °F15.65 in.

Climate Data for Big Arm 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 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