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.
Today
46°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny. High near 46, with temperatures falling to around 41 in the afternoon. Northwest wind 3 to 8 mph.
7-day forecast for Fort Belknap Agency
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 46°F | Patchy Fog then Sunny | 3 to 8 mph NW | 0% |
| Tonight | 29°F | Partly Cloudy | 1 to 5 mph SSE | 0% |
| Thursday | 51°F | Mostly Sunny | 2 to 6 mph SW | 0% |
| Thursday Night | 35°F | Partly Cloudy | 6 to 13 mph W | 0% |
| Friday | 55°F | Sunny | 5 to 10 mph WSW | 0% |
| Friday Night | 39°F | Partly Cloudy | 8 to 18 mph WSW | 0% |
| Saturday | 58°F | Sunny | 3 to 16 mph WSW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 5 mph SSE | 0% |
| Sunday | 63°F | Partly Sunny | 5 to 15 mph WSW | 0% |
| Sunday Night | 39°F | Partly Cloudy | 10 to 25 mph W | 1% |
| Monday | 53°F | Mostly Sunny | 6 to 10 mph W | 1% |
| Monday Night | 35°F | Partly Cloudy | 6 mph S | 1% |
| Tuesday | 59°F | Mostly Sunny | 3 to 9 mph SW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 5 to 8 mph W | 1% |
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 Nov 4, 2026.