Belknap, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belknap, a community in Sanders County, Montana.
This Afternoon
52°F
Mostly Cloudy
Mostly cloudy. High near 52, with temperatures falling to around 47 in the afternoon. Wind around 0 mph.
7-day forecast for Belknap
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Mostly Cloudy | 0 mph | 1% |
| Tonight | 34°F | Mostly Cloudy | 0 mph | 2% |
| Wednesday | 55°F | Sunny | 1 mph NW | 0% |
| Wednesday Night | 34°F | Partly Cloudy then Slight Chance Rain And Snow | 1 mph S | 15% |
| Thursday | 49°F | Chance Rain And Snow | 3 mph SW | 45% |
| Thursday Night | 36°F | Mostly Cloudy | 3 mph SSW | 13% |
| Friday | 51°F | Chance Light Rain | 3 mph SSW | 25% |
| Friday Night | 38°F | Chance Light Rain then Mostly Cloudy | 1 to 5 mph SSW | 25% |
| Saturday | 56°F | Partly Sunny | 2 mph S | 5% |
| Saturday Night | 39°F | Mostly Cloudy then Slight Chance Light Rain | 3 mph SSE | 20% |
| Sunday | 59°F | Chance Light Rain | 3 mph SSW | 44% |
| Sunday Night | 38°F | Slight Chance Light Rain | 2 mph SW | 24% |
| Monday | 55°F | Slight Chance Light Rain | 1 mph S | 24% |
| Monday Night | 39°F | Chance Light Rain | 2 mph S | 32% |
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 Nov 4, 2026.