White Sulphur Springs, MT Weather & Growing Conditions
Today
49°F
Sunny
Sunny. High near 49, with temperatures falling to around 41 in the afternoon. North northwest wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 49°F | Sunny | 0 to 3 mph NNW | 0% |
| Tonight | 22°F | Mostly Clear | 2 to 8 mph ESE | 0% |
| Thursday | 46°F | Mostly Sunny | 3 to 8 mph SW | 3% |
| Thursday Night | 22°F | Partly Cloudy | 7 mph WSW | 3% |
| Friday | 47°F | Sunny | 6 to 10 mph SSW | 0% |
| Friday Night | 26°F | Partly Cloudy | 9 mph S | 0% |
| Saturday | 52°F | Sunny | 7 mph S | 0% |
| Saturday Night | 30°F | Partly Cloudy | 6 to 14 mph SSE | 0% |
| Sunday | 57°F | Mostly Sunny | 7 to 13 mph SSW | 3% |
| Sunday Night | 29°F | Mostly Cloudy | 3 to 7 mph W | 3% |
| Monday | 52°F | Mostly Sunny | 2 to 6 mph SW | 2% |
| Monday Night | 29°F | Partly Cloudy | 6 mph SSE | 2% |
| Tuesday | 54°F | Mostly Sunny | 3 to 8 mph SSW | 4% |
| Tuesday Night | 30°F | Partly Cloudy | 8 mph S | 4% |
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 Nov 4, 2026.