Belle Fourche, MT Weather & Growing Conditions
Overnight
46°F
Areas Of Smoke
Areas of smoke. Mostly clear. Low around 46, with temperatures rising to around 48 overnight. Northwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Areas Of Smoke | 3 mph NW | 0% |
| Tuesday | 76°F | Areas Of Smoke then Sunny | 5 to 8 mph NW | 0% |
| Tuesday Night | 51°F | Mostly Clear | 2 to 7 mph N | 14% |
| Wednesday | 84°F | Sunny | 2 to 6 mph SW | 1% |
| Wednesday Night | 55°F | Mostly Clear | 3 to 8 mph S | 1% |
| Thursday | 92°F | Sunny | 3 to 9 mph NW | 1% |
| Thursday Night | 59°F | Clear | 5 to 9 mph NE | 0% |
| Friday | 95°F | Sunny | 5 to 12 mph N | 0% |
| Friday Night | 61°F | Mostly Clear | 5 to 15 mph E | 0% |
| Saturday | 97°F | Sunny | 5 to 16 mph N | 1% |
| Saturday Night | 62°F | Mostly Clear | 6 to 16 mph NE | 5% |
| Sunday | 96°F | Mostly Sunny | 7 to 21 mph E | 9% |
| Sunday Night | 62°F | Slight Chance Showers And Thunderstorms | 8 to 21 mph E | 19% |
| Monday | 93°F | Mostly Sunny | 8 to 22 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Belle Fourche, MT
Last spring frost
May 15
First fall frost
Sep 24
Growing season
130 days
Hardiness zone
4b
Explore more for Belle Fourche, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Belle Fourche 22 Nnw, Sd (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.