White Sulphur Springs, MT Weather & Growing Conditions
Today
58°F
Rain then Showers And Thunderstorms
Rain before noon, then showers and thunderstorms between noon and 3pm, then rain likely. Cloudy. High near 58, with temperatures falling to around 55 in the afternoon. North wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 58°F | Rain then Showers And Thunderstorms | 6 mph N | 85% |
| Tonight | 40°F | Chance Light Rain then Patchy Fog | 2 to 6 mph ENE | 38% |
| Sunday | 66°F | Patchy Fog then Partly Sunny | 2 to 6 mph SSW | 10% |
| Sunday Night | 39°F | Mostly Clear | 6 mph S | 1% |
| Monday | 73°F | Sunny | 7 mph S | 0% |
| Monday Night | 41°F | Mostly Clear | 6 mph SSE | 0% |
| Tuesday | 73°F | Sunny | 6 mph S | 0% |
| Tuesday Night | 43°F | Mostly Clear | 5 mph ESE | 1% |
| Wednesday | 74°F | Sunny | 3 to 8 mph S | 1% |
| Wednesday Night | 44°F | Mostly Clear | 8 mph SE | 2% |
| Thursday | 75°F | Sunny | 6 to 9 mph SSE | 1% |
| Thursday Night | 44°F | Mostly Clear | 9 mph SSE | 5% |
| Friday | 74°F | Mostly Sunny | 7 to 12 mph S | 3% |
| Friday Night | 42°F | Slight Chance Light Rain then Partly Cloudy | 10 mph ENE | 15% |
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.