Columbia Falls, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Columbia Falls, a city in Flathead County, Montana.
Live forecast is briefly unavailable; the local growing information below is from NOAA climate normals.
Growing snapshot for Columbia Falls
Last spring frost
May 16
First fall frost
Sep 25
Growing season
129 days
Hardiness zone
5a
More local growing data for Columbia Falls: nearby ZIP 59912 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Whitefish, Mt (9 mi from Columbia Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.