Fortine Montana Climate Data

Monthly Average Climate Data for Fortine Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.9 °F30.4 °F1.01 in.
February16.7 °F36.3 °F0.75 in.
March22.8 °F45.3 °F0.88 in.
April29.1 °F55.0 °F1.18 in.
May36.7 °F65.7 °F1.86 in.
June43.3 °F72.2 °F3.08 in.
July47.4 °F82.6 °F1.4 in.
August45.7 °F82.5 °F0.76 in.
September37.9 °F71.0 °F1.33 in.
October29.8 °F54.4 °F1.03 in.
November23.8 °F39.1 °F1.21 in.
December16.9 °F29.8 °F1.21 in.
Annual30.5 °F55.4 °F15.7 in.

Climate Data for Fortine Montana

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateMay 21 - May 31
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year