Fort Belknap Agency, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Belknap Agency, a community in Blaine County, Montana.
Overnight
41°F
Mostly Clear
Mostly clear, with a low around 41. West wind around 6 mph.
7-day forecast for Fort Belknap Agency
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 78°F | Sunny | 6 to 13 mph WNW | 1% |
| Tuesday Night | 49°F | Mostly Clear | 3 to 13 mph WSW | 1% |
| Wednesday | 87°F | Mostly Sunny | 3 to 16 mph W | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 2 to 15 mph W | 0% |
| Thursday | 94°F | Sunny | 3 to 15 mph WNW | 0% |
| Thursday Night | 54°F | Mostly Clear | 5 to 16 mph NNE | 0% |
| Friday | 95°F | Sunny | 6 to 15 mph ESE | 0% |
| Friday Night | 56°F | Mostly Clear | 10 to 15 mph NE | 0% |
| Saturday | 93°F | Sunny | 14 mph NE | 0% |
| Saturday Night | 56°F | Partly Cloudy | 13 mph NE | 1% |
| Sunday | 90°F | Mostly Sunny | 12 to 15 mph NNE | 2% |
| Sunday Night | 55°F | Partly Cloudy | 12 to 15 mph NE | 14% |
| Monday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 to 14 mph ENE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Fort Belknap Agency (48.430, -108.680). Updated through the day.
Growing snapshot for Fort Belknap Agency
Last spring frost
May 16
First fall frost
Sep 22
Growing season
128 days
Hardiness zone
4a
More local growing data for Fort Belknap Agency: nearby ZIP 59526 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ft Belknap 2 Sw, Mt (3.6 mi from Fort Belknap Agency). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.