White Sulphur Springs, MT Weather & Growing Conditions
Today
71°F
Sunny
Sunny, with a high near 71. West southwest wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Sunny | 2 to 7 mph WSW | 0% |
| Tonight | 40°F | Mostly Clear | 7 mph ENE | 1% |
| Wednesday | 78°F | Sunny | 2 to 9 mph WSW | 0% |
| Wednesday Night | 44°F | Mostly Clear | 3 to 8 mph NW | 0% |
| Thursday | 86°F | Sunny | 3 to 12 mph WSW | 0% |
| Thursday Night | 49°F | Mostly Clear | 3 to 10 mph ENE | 0% |
| Friday | 91°F | Sunny | 3 to 15 mph SSW | 0% |
| Friday Night | 51°F | Mostly Clear | 3 to 16 mph WNW | 0% |
| Saturday | 87°F | Sunny | 2 to 12 mph SSW | 0% |
| Saturday Night | 52°F | Mostly Clear | 3 to 10 mph NNE | 0% |
| Sunday | 85°F | Sunny | 2 to 9 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 5 to 9 mph NNE | 2% |
| Monday | 83°F | Sunny | 2 to 8 mph NNE | 3% |
| Monday Night | 49°F | Partly Cloudy | 6 to 9 mph ENE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for White Sulphur Springs, MT
Last spring frost
Jun 4
First fall frost
Sep 11
Growing season
97 days
Hardiness zone
4b
Explore more for White Sulphur Springs, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, White Sulphur Springs #2, Mt (12.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.