Fortine, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fortine, a community in Lincoln County, Montana.
Tonight
28°F
Mostly Cloudy
Mostly cloudy, with a low around 28. Wind around 0 mph.
7-day forecast for Fortine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 47°F | Mostly Sunny | 0 mph | 0% |
| Wednesday Night | 29°F | Partly Cloudy | 0 to 3 mph SSE | 3% |
| Thursday | 43°F | Slight Chance Light Rain | 3 mph S | 15% |
| Thursday Night | 32°F | Mostly Cloudy | 3 mph S | 12% |
| Friday | 45°F | Mostly Cloudy then Slight Chance Light Rain | 3 mph S | 21% |
| Friday Night | 32°F | Slight Chance Light Rain | 5 mph S | 21% |
| Saturday | 50°F | Partly Sunny | 3 mph SSE | 9% |
| Saturday Night | 35°F | Mostly Cloudy then Chance Light Rain | 1 to 7 mph SSE | 51% |
| Sunday | 52°F | Chance Light Rain | 3 to 9 mph SSW | 51% |
| Sunday Night | 33°F | Chance Light Rain | 5 mph S | 31% |
| Monday | 48°F | Partly Sunny then Slight Chance Light Rain | 2 mph SSE | 21% |
| Monday Night | 34°F | Slight Chance Light Rain then Slight Chance Rain And Snow | 2 mph SSE | 22% |
| Tuesday | 50°F | Slight Chance Rain And Snow | 3 mph S | 23% |
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
Nearby towns & communities
Eureka
Happys Inn
Indian Springs
Libby
Pioneer Junction
Rexford
Stryker
Sylvanite
Trego
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 Nov 4, 2026.