White Sulphur Springs, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for White Sulphur Springs, a city in Meagher County, Montana.
Today
73°F
Sunny
Sunny, with a high near 73. West wind 2 to 7 mph.
7-day forecast for White Sulphur Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 2 to 7 mph W | 0% |
| Tonight | 42°F | Mostly Clear | 3 to 7 mph NNE | 1% |
| Wednesday | 80°F | Sunny | 2 to 8 mph W | 0% |
| Wednesday Night | 45°F | Mostly Clear | 3 to 7 mph NW | 0% |
| Thursday | 88°F | Sunny | 2 to 12 mph WSW | 0% |
| Thursday Night | 50°F | Mostly Clear | 3 to 10 mph N | 0% |
| Friday | 93°F | Sunny | 3 to 14 mph SSW | 0% |
| Friday Night | 52°F | Partly Cloudy | 2 to 16 mph W | 0% |
| Saturday | 89°F | Sunny | 2 to 10 mph WSW | 0% |
| Saturday Night | 52°F | Mostly Clear | 3 to 10 mph N | 1% |
| Sunday | 88°F | Sunny | 2 to 8 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 5 to 8 mph NE | 2% |
| Monday | 86°F | Sunny | 2 to 8 mph NNE | 3% |
| Monday Night | 50°F | Partly Cloudy | 6 to 9 mph ENE | 8% |
Forecast source: National Weather Service (api.weather.gov) for White Sulphur Springs (46.545, -110.904). Updated through the day.
Growing snapshot for White Sulphur Springs
Last spring frost
Jun 4
First fall frost
Sep 11
Growing season
97 days
Hardiness zone
4b
More local growing data for White Sulphur Springs: nearby ZIP 59645 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, White Sulphur Springs #2, Mt (12.4 mi from White Sulphur Springs). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.