Belle Fourche, MT Weather & Growing Conditions
This Afternoon
54°F
Sunny
Sunny. High near 54, with temperatures falling to around 45 in the afternoon. Northwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Sunny | 10 mph NW | 0% |
| Tonight | 28°F | Mostly Clear | 8 mph NW | 0% |
| Wednesday | 53°F | Partly Sunny | 10 mph NW | 0% |
| Wednesday Night | 28°F | Mostly Cloudy | 9 mph W | 0% |
| Thursday | 55°F | Mostly Sunny | 3 to 9 mph SW | 0% |
| Thursday Night | 30°F | Partly Cloudy | 5 to 8 mph SW | 0% |
| Friday | 55°F | Mostly Sunny | 6 to 12 mph W | 0% |
| Friday Night | 33°F | Mostly Clear | 6 to 12 mph W | 3% |
| Saturday | 59°F | Sunny | 10 to 24 mph W | 3% |
| Saturday Night | 32°F | Mostly Clear | 5 to 9 mph W | 0% |
| Sunday | 65°F | Sunny | 5 to 8 mph SW | 0% |
| Sunday Night | 39°F | Mostly Clear | 8 to 12 mph W | 0% |
| Monday | 60°F | Mostly Sunny | 7 to 10 mph NW | 0% |
| Monday Night | 34°F | Partly Cloudy | 6 mph W | 1% |
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 Nov 4, 2026.