Fort Shaw, MT Weather & Growing Conditions
This Afternoon
53°F
Mostly Sunny
Mostly sunny. High near 53, with temperatures falling to around 47 in the afternoon. South wind 6 to 14 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 53°F | Mostly Sunny | 6 to 14 mph S | 0% |
| Tonight | 29°F | Mostly Cloudy | 6 mph WSW | 0% |
| Wednesday | 49°F | Mostly Sunny | 3 mph WNW | 0% |
| Wednesday Night | 30°F | Mostly Clear | 2 to 9 mph SSW | 0% |
| Thursday | 54°F | Mostly Sunny | 9 to 15 mph SW | 0% |
| Thursday Night | 34°F | Mostly Clear | 14 mph SW | 0% |
| Friday | 53°F | Mostly Sunny | 14 to 23 mph SW | 1% |
| Friday Night | 37°F | Partly Cloudy | 16 to 22 mph SW | 1% |
| Saturday | 55°F | Mostly Sunny | 8 to 16 mph SW | 0% |
| Saturday Night | 38°F | Partly Cloudy | 8 to 16 mph SSW | 0% |
| Sunday | 60°F | Partly Sunny | 14 to 20 mph SW | 0% |
| Sunday Night | 39°F | Mostly Cloudy | 8 to 14 mph SW | 1% |
| Monday | 55°F | Partly Sunny | 8 mph SW | 1% |
| Monday Night | 38°F | Mostly Cloudy | 7 to 12 mph SSW | 1% |
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
4b
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 (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.