Fort Shaw, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Shaw, a community in Cascade County, Montana.
This Afternoon
73°F
Mostly Cloudy
Mostly cloudy, with a high near 73. North northeast wind around 10 mph.
7-day forecast for Fort Shaw
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Cloudy | 10 mph NNE | 3% |
| Tonight | 53°F | Chance Light Rain | 6 to 10 mph NNE | 31% |
| Saturday | 66°F | Slight Chance Light Rain then Cloudy | 7 mph NNE | 24% |
| Saturday Night | 48°F | Mostly Cloudy | 2 to 7 mph SSW | 4% |
| Sunday | 75°F | Sunny | 2 to 6 mph S | 1% |
| Sunday Night | 49°F | Mostly Clear | 2 to 8 mph SSE | 0% |
| Monday | 80°F | Sunny | 3 to 8 mph SSW | 0% |
| Monday Night | 50°F | Mostly Clear | 6 mph SW | 0% |
| Tuesday | 79°F | Sunny | 5 mph WSW | 0% |
| Tuesday Night | 51°F | Mostly Clear | 3 to 7 mph SE | 0% |
| Wednesday | 79°F | Sunny | 5 to 9 mph SW | 0% |
| Wednesday Night | 51°F | Mostly Clear | 3 to 7 mph SW | 3% |
| Thursday | 80°F | Sunny | 3 to 8 mph SSW | 1% |
| Thursday Night | 52°F | Partly Cloudy | 3 to 8 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Fort Shaw (47.497, -111.819). Updated through the day.
Growing snapshot for Fort Shaw
Last spring frost
Jun 2
First fall frost
Sep 10
Growing season
96 days
Hardiness zone
4b
More local growing data for Fort Shaw: nearby ZIP 59443 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Sun Rvr 4 S, Mt (7.4 mi from Fort Shaw). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.