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
51°F
Sunny
Sunny. High near 51, with temperatures falling to around 43 in the afternoon. West wind around 2 mph.
7-day forecast for White Sulphur Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Sunny | 2 mph W | 0% |
| Tonight | 23°F | Mostly Clear | 2 to 6 mph E | 0% |
| Thursday | 48°F | Mostly Sunny | 3 to 7 mph WSW | 5% |
| Thursday Night | 22°F | Partly Cloudy | 6 mph WSW | 5% |
| Friday | 48°F | Sunny | 5 to 10 mph SW | 0% |
| Friday Night | 27°F | Partly Cloudy | 9 mph SSW | 0% |
| Saturday | 54°F | Sunny | 7 mph SSW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 6 to 10 mph S | 0% |
| Sunday | 58°F | Mostly Sunny | 7 to 12 mph SSW | 3% |
| Sunday Night | 29°F | Mostly Cloudy | 3 to 7 mph WSW | 3% |
| Monday | 54°F | Mostly Sunny | 2 to 6 mph SW | 2% |
| Monday Night | 30°F | Partly Cloudy | 5 mph S | 2% |
| Tuesday | 56°F | Mostly Sunny | 5 to 8 mph SSW | 3% |
| Tuesday Night | 31°F | Partly Cloudy | 7 mph SSW | 3% |
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 Nov 4, 2026.