Belknap, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belknap, a community in Sanders County, Montana.
Today
82°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 82. North northwest wind around 2 mph.
7-day forecast for Belknap
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Patchy Smoke | 2 mph NNW | 0% |
| Tonight | 53°F | Patchy Smoke then Mostly Clear | 0 to 3 mph NW | 0% |
| Wednesday | 88°F | Sunny | 2 mph NNW | 0% |
| Wednesday Night | 55°F | Clear | 0 to 3 mph NW | 0% |
| Thursday | 94°F | Sunny | 0 to 3 mph W | 0% |
| Thursday Night | 59°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Friday | 94°F | Sunny | 0 to 6 mph SW | 0% |
| Friday Night | 58°F | Clear | 2 to 9 mph SW | 0% |
| Saturday | 91°F | Sunny | 0 to 7 mph SW | 0% |
| Saturday Night | 58°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Sunday | 88°F | Sunny | 0 to 3 mph SW | 0% |
| Sunday Night | 56°F | Mostly Clear | 0 to 6 mph W | 0% |
| Monday | 87°F | Sunny | 2 mph NW | 0% |
| Monday Night | 55°F | Mostly Clear | 0 to 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Belknap (47.647, -115.422). Updated through the day.
Growing snapshot for Belknap
Last spring frost
May 7
First fall frost
Oct 4
Growing season
150 days
Hardiness zone
6a
More local growing data for Belknap: nearby ZIP 59873 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Bull Lake
Camas
Dixon
Heron
Hot Springs
Lonepine
Noxon
Old Agency
Paradise
Plains
Thompson Falls
Trout Creek
Climate data from the nearest NOAA station, Thompson Falls Ph, Mt (6.3 mi from Belknap). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.