Fort Shaw, MT Weather & Growing Conditions
Today
68°F
Slight Chance Light Rain then Mostly Cloudy
A slight chance of rain before 11am. Mostly cloudy, with a high near 68. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 8 mph NE | 21% |
| Tonight | 46°F | Mostly Cloudy | 2 to 7 mph SSE | 4% |
| Sunday | 74°F | Mostly Sunny | 2 to 6 mph S | 1% |
| Sunday Night | 47°F | Mostly Clear | 3 to 7 mph S | 0% |
| Monday | 79°F | Sunny | 3 to 8 mph SSW | 0% |
| Monday Night | 49°F | Mostly Clear | 7 mph SW | 0% |
| Tuesday | 79°F | Sunny | 6 mph WSW | 0% |
| Tuesday Night | 50°F | Mostly Clear | 7 mph SSW | 0% |
| Wednesday | 80°F | Sunny | 3 to 9 mph SSW | 1% |
| Wednesday Night | 50°F | Mostly Clear | 5 to 8 mph SW | 3% |
| Thursday | 80°F | Sunny | 5 to 9 mph SSW | 2% |
| Thursday Night | 50°F | Partly Cloudy | 7 mph SSW | 6% |
| Friday | 76°F | Mostly Sunny | 5 to 12 mph SSW | 7% |
| Friday Night | 47°F | Slight Chance Light Rain | 7 to 10 mph W | 23% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fort Shaw, MT
Last spring frost
Jun 2
First fall frost
Sep 10
Growing season
96 days
Hardiness zone
4a
Explore more for Fort Shaw, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Sun Rvr 4 S, Mt (0.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.