Fort Smith Montana Climate Data

Monthly Average Climate Data for Fort Smith Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F38.9 °F0.75 in.
February18.9 °F41.8 °F0.76 in.
March26.5 °F51.3 °F1.2 in.
April34.7 °F59.7 °F2.22 in.
May43.4 °F69.5 °F2.64 in.
June51.7 °F79.7 °F2.09 in.
July58.0 °F90.0 °F1.13 in.
August55.8 °F88.6 °F0.79 in.
September47.2 °F77.6 °F1.66 in.
October36.2 °F62.5 °F1.91 in.
November26.1 °F48.6 °F0.92 in.
December18.6 °F39.6 °F0.69 in.
Annual36.2 °F62.3 °F16.76 in.

Climate Data for Fort Smith Montana

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year