Fortine, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fortine, a community in Lincoln County, Montana.
This Afternoon
76°F
Mostly Sunny
Mostly sunny, with a high near 76. West wind around 3 mph.
7-day forecast for Fortine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 3 mph W | 0% |
| Tonight | 47°F | Partly Cloudy | 1 mph NE | 4% |
| Saturday | 77°F | Sunny | 1 mph W | 3% |
| Saturday Night | 47°F | Partly Cloudy | 1 mph E | 0% |
| Sunday | 78°F | Sunny | 1 mph S | 0% |
| Sunday Night | 49°F | Mostly Clear | 1 mph SE | 0% |
| Monday | 78°F | Sunny | 2 mph S | 0% |
| Monday Night | 49°F | Partly Cloudy | 1 mph S | 0% |
| Tuesday | 77°F | Sunny | 2 mph S | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 2 mph S | 1% |
| Wednesday | 73°F | Sunny | 1 to 5 mph S | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph S | 1% |
| Thursday | 75°F | Mostly Sunny | 2 mph SSE | 2% |
| Thursday Night | 49°F | Partly Cloudy | 3 mph SE | 3% |
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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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 Sep 18, 2026.