Fort Shaw, MT Weather & Growing Conditions
This Afternoon
67°F
Mostly Cloudy
Mostly cloudy, with a high near 67. East southeast wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Cloudy | 8 mph ESE | 9% |
| Tonight | 46°F | Mostly Cloudy | 2 to 8 mph S | 4% |
| Sunday | 74°F | Sunny | 2 to 7 mph SSE | 1% |
| Sunday Night | 46°F | Mostly Clear | 3 to 7 mph S | 0% |
| Monday | 79°F | Sunny | 2 to 8 mph SW | 0% |
| Monday Night | 49°F | Mostly Clear | 6 mph SSW | 0% |
| Tuesday | 80°F | Sunny | 7 mph SW | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 6 mph WSW | 3% |
| Wednesday | 80°F | Mostly Sunny | 5 to 9 mph SW | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 5 to 10 mph WSW | 6% |
| Thursday | 78°F | Mostly Sunny | 3 to 9 mph SSW | 3% |
| Thursday Night | 51°F | Partly Cloudy | 5 to 10 mph N | 7% |
| Friday | 76°F | Mostly Sunny | 3 to 13 mph SW | 9% |
| Friday Night | 49°F | Mostly Cloudy | 7 to 12 mph WSW | 13% |
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 20, 2026.