Chinook Montana Climate Data

Monthly Average Climate Data for Chinook Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January5.5 °F28.0 °F0.43 in.
February8.1 °F32.2 °F0.39 in.
March18.7 °F43.8 °F0.56 in.
April29.9 °F57.3 °F1.07 in.
May39.9 °F67.2 °F2.26 in.
June49.1 °F75.9 °F2.96 in.
July54.1 °F85.1 °F1.73 in.
August52.0 °F84.7 °F1.29 in.
September41.9 °F73.5 °F1.1 in.
October30.0 °F57.7 °F0.82 in.
November18.2 °F42.5 °F0.69 in.
December8.5 °F31.8 °F0.4 in.
Annual29.7 °F56.6 °F13.7 in.

Climate Data for Chinook Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 3b : -35°F to -30°F
Plant Hardiness Zone - 2012Zone 3b : -35°F to -30°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate