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
71°F
Mostly Cloudy
Mostly cloudy, with a high near 71. East northeast wind 3 to 12 mph.
7-day forecast for Fort Belknap Agency
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Mostly Cloudy | 3 to 12 mph ENE | 0% |
| Tonight | 48°F | Mostly Cloudy | 5 to 10 mph ESE | 10% |
| Sunday | 69°F | Partly Sunny | 6 to 13 mph ESE | 6% |
| Sunday Night | 48°F | Partly Cloudy | 8 to 14 mph SE | 0% |
| Monday | 75°F | Mostly Sunny | 9 to 15 mph SE | 0% |
| Monday Night | 49°F | Mostly Clear | 6 to 15 mph SE | 0% |
| Tuesday | 80°F | Sunny | 6 mph SSE | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 2 to 6 mph ESE | 1% |
| Wednesday | 82°F | Sunny | 2 to 8 mph SE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 7 mph SE | 4% |
| Thursday | 82°F | Sunny | 5 to 9 mph S | 3% |
| Thursday Night | 52°F | Mostly Clear | 10 mph SE | 8% |
| Friday | 80°F | Mostly Sunny | 9 to 15 mph ESE | 6% |
| Friday Night | 48°F | Partly Cloudy then Slight Chance Light Rain | 12 to 15 mph NNE | 18% |
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 Sep 19, 2026.