White Sulphur Springs, MT Weather & Growing Conditions
This Afternoon
70°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 70, with temperatures falling to around 65 in the afternoon. North wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Chance Showers And Thunderstorms | 10 mph N | 54% |
| Tonight | 47°F | Showers And Thunderstorms | 5 to 12 mph NNE | 93% |
| Saturday | 55°F | Showers And Thunderstorms | 5 to 8 mph NNW | 95% |
| Saturday Night | 43°F | Chance Light Rain | 2 to 6 mph NE | 46% |
| Sunday | 66°F | Partly Sunny | 2 to 6 mph SW | 8% |
| Sunday Night | 41°F | Mostly Clear | 7 mph SSE | 1% |
| Monday | 72°F | Sunny | 7 mph S | 0% |
| Monday Night | 43°F | Mostly Clear | 5 mph SSE | 0% |
| Tuesday | 73°F | Sunny | 2 to 6 mph SSW | 0% |
| Tuesday Night | 44°F | Mostly Clear | 6 mph ESE | 2% |
| Wednesday | 73°F | Sunny | 3 to 8 mph S | 1% |
| Wednesday Night | 44°F | Mostly Clear | 6 mph SE | 3% |
| Thursday | 75°F | Sunny | 5 to 9 mph SSE | 2% |
| Thursday Night | 44°F | Mostly Clear | 6 to 9 mph SE | 2% |
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 Sep 19, 2026.