Fortine, MT Weather & Growing Conditions
Today
66°F
Mostly Sunny
Mostly sunny, with a high near 66. West southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Mostly Sunny | 7 mph WSW | 0% |
| Tonight | 47°F | Mostly Clear | 3 to 7 mph W | 0% |
| Wednesday | 72°F | Sunny | 3 to 8 mph WSW | 0% |
| Wednesday Night | 50°F | Mostly Clear | 3 to 8 mph SSW | 0% |
| Thursday | 78°F | Sunny | 5 to 10 mph S | 0% |
| Thursday Night | 54°F | Mostly Clear | 3 to 12 mph S | 0% |
| Friday | 79°F | Sunny | 5 to 14 mph S | 0% |
| Friday Night | 54°F | Mostly Clear | 8 to 20 mph SSW | 0% |
| Saturday | 76°F | Sunny | 8 to 15 mph SSW | 0% |
| Saturday Night | 53°F | Partly Cloudy | 7 to 15 mph S | 0% |
| Sunday | 73°F | Mostly Sunny | 6 to 10 mph SSW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 7 to 12 mph WNW | 1% |
| Monday | 72°F | Sunny | 7 mph N | 6% |
| Monday Night | 49°F | Mostly Clear | 8 mph NNW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fortine, MT
Last spring frost
May 16
First fall frost
Sep 18
Growing season
121 days
Hardiness zone
5a
Explore more for Fortine, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Fortine 1 N, Mt (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.