Fortine, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fortine, a community in Lincoln County, Montana.
Overnight
44°F
Mostly Clear
Mostly clear, with a low around 44. Wind around 0 mph.
7-day forecast for Fortine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 81°F | Sunny | 2 mph NW | 0% |
| Tuesday Night | 49°F | Mostly Clear | 1 mph SE | 0% |
| Wednesday | 88°F | Sunny | 2 mph W | 0% |
| Wednesday Night | 52°F | Mostly Clear | 2 mph SSW | 0% |
| Thursday | 95°F | Sunny | 0 to 3 mph SSW | 0% |
| Thursday Night | 55°F | Mostly Clear | 0 to 3 mph S | 0% |
| Friday | 96°F | Sunny | 0 to 6 mph SSW | 0% |
| Friday Night | 55°F | Mostly Clear | 2 to 9 mph SSW | 0% |
| Saturday | 92°F | Sunny | 2 to 7 mph S | 0% |
| Saturday Night | 54°F | Mostly Clear | 1 to 6 mph S | 0% |
| Sunday | 89°F | Mostly Sunny | 3 mph S | 0% |
| Sunday Night | 52°F | Partly Cloudy | 3 mph S | 1% |
| Monday | 88°F | Sunny | 2 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Fortine (48.770, -114.886). Updated through the day.
Growing snapshot for Fortine
Last spring frost
May 16
First fall frost
Sep 18
Growing season
121 days
Hardiness zone
5a
More local growing data for Fortine: nearby ZIP 59918 weather · frost dates · planting calendar · Montana frost dates
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Troy
West Kootenai
White Haven
Yaak
Climate data from the nearest NOAA station, Fortine 1 N, Mt (6.4 mi from Fortine). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.