Belle Fourche, MT Weather & Growing Conditions
Today
66°F
Areas Of Fog then Showers And Thunderstorms Likely
Areas of fog and a chance of showers and thunderstorms before 9am, then patchy fog and a chance of showers and thunderstorms between 9am and noon, then showers and thunderstorms likely. Cloudy. High near 66, with temperatures falling to around 64 in the afternoon. East wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Areas Of Fog then Showers And Thunderstorms Likely | 7 to 13 mph E | 57% |
| Tonight | 49°F | Showers And Thunderstorms | 14 mph E | 80% |
| Sunday | 59°F | Rain Showers | 15 mph E | 89% |
| Sunday Night | 46°F | Rain Showers | 10 to 16 mph E | 85% |
| Monday | 65°F | Mostly Cloudy | 10 to 22 mph SE | 14% |
| Monday Night | 46°F | Partly Cloudy | 12 to 22 mph SE | 3% |
| Tuesday | 74°F | Mostly Sunny | 12 to 24 mph SE | 2% |
| Tuesday Night | 50°F | Mostly Clear | 3 to 24 mph SE | 6% |
| Wednesday | 77°F | Mostly Sunny | 3 to 10 mph SE | 12% |
| Wednesday Night | 51°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 10 mph SW | 20% |
| Thursday | 80°F | Mostly Sunny | 3 to 13 mph S | 4% |
| Thursday Night | 52°F | Mostly Clear | 6 to 14 mph SE | 5% |
| Friday | 81°F | Mostly Sunny | 6 to 21 mph SE | 3% |
| Friday Night | 53°F | Partly Cloudy | 9 to 21 mph SE | 11% |
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 Sep 19, 2026.