Fortine, MT Weather & Growing Conditions
Tonight
26°F
Mostly Cloudy
Mostly cloudy, with a low around 26. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 26°F | Mostly Cloudy | 2 mph N | 0% |
| Wednesday | 40°F | Mostly Sunny | 1 to 5 mph SE | 0% |
| Wednesday Night | 26°F | Mostly Clear | 5 to 8 mph SSE | 3% |
| Thursday | 34°F | Slight Chance Light Snow | 9 mph SSW | 20% |
| Thursday Night | 29°F | Slight Chance Light Snow then Mostly Cloudy | 8 to 12 mph SSW | 17% |
| Friday | 37°F | Mostly Cloudy then Slight Chance Rain And Snow | 13 mph SSW | 24% |
| Friday Night | 30°F | Slight Chance Rain And Snow | 10 to 16 mph SSW | 24% |
| Saturday | 41°F | Partly Sunny | 6 to 10 mph SSW | 9% |
| Saturday Night | 33°F | Mostly Cloudy then Chance Rain And Snow | 6 to 18 mph S | 52% |
| Sunday | 42°F | Chance Rain And Snow | 12 to 18 mph SSW | 52% |
| Sunday Night | 31°F | Chance Rain And Snow | 9 to 14 mph SSW | 35% |
| Monday | 40°F | Partly Sunny then Slight Chance Rain And Snow | 5 to 9 mph SSW | 22% |
| Monday Night | 32°F | Slight Chance Rain And Snow | 5 to 12 mph S | 23% |
| Tuesday | 41°F | Slight Chance Light Snow | 7 to 10 mph SW | 23% |
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 Nov 4, 2026.