Belle Fourche, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belle Fourche, a city in Lawrence County, South Dakota.
Today
77°F
Areas Of Smoke then Sunny
Areas of smoke before noon. Sunny, with a high near 77. Northwest wind around 5 mph, with gusts as high as 17 mph.
7-day forecast for Belle Fourche
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Areas Of Smoke then Sunny | 5 mph NW | 1% |
| Tonight | 51°F | Mostly Clear then Slight Chance Rain Showers | 5 mph S | 16% |
| Wednesday | 84°F | Sunny | 1 to 5 mph SE | 3% |
| Wednesday Night | 55°F | Mostly Clear | 6 mph S | 0% |
| Thursday | 92°F | Sunny | 2 to 7 mph NW | 1% |
| Thursday Night | 58°F | Mostly Clear | 3 to 7 mph S | 0% |
| Friday | 96°F | Sunny | 3 to 12 mph N | 0% |
| Friday Night | 62°F | Mostly Clear | 3 to 14 mph S | 0% |
| Saturday | 97°F | Sunny | 2 to 15 mph NW | 2% |
| Saturday Night | 61°F | Mostly Clear | 5 to 15 mph E | 5% |
| Sunday | 96°F | Mostly Sunny | 5 to 20 mph SE | 11% |
| Sunday Night | 62°F | Slight Chance Showers And Thunderstorms | 5 to 18 mph E | 19% |
| Monday | 93°F | Mostly Sunny | 5 to 21 mph E | 14% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 8 to 21 mph E | 37% |
Forecast source: National Weather Service (api.weather.gov) for Belle Fourche (44.664, -103.859). Updated through the day.
Growing snapshot for Belle Fourche
Last spring frost
May 12
First fall frost
Oct 2
Growing season
143 days
Hardiness zone
5b
More local growing data for Belle Fourche: nearby ZIP 57779 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Boulder Canyon
Central City
Crook City
Deadwood
Lead
Mountain Plains
North Spearfish
Spearfish
St. Onge
Whitewood
Climate data from the nearest NOAA station, Spearfish, Sd (7.4 mi from Belle Fourche). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.