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
59°F
Rain Likely then Showers And Thunderstorms
Rain likely before noon, then showers and thunderstorms. Cloudy. High near 59, with temperatures falling to around 56 in the afternoon. Northeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for White Sulphur Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Rain Likely then Showers And Thunderstorms | 6 mph NE | 82% |
| Tonight | 41°F | Chance Light Rain then Patchy Fog | 2 to 6 mph NNE | 26% |
| Sunday | 67°F | Areas Of Fog then Partly Sunny | 1 to 5 mph SW | 7% |
| Sunday Night | 40°F | Partly Cloudy | 5 mph SSE | 4% |
| Monday | 73°F | Sunny | 6 mph S | 0% |
| Monday Night | 42°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 75°F | Sunny | 2 to 6 mph S | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 5 mph SE | 1% |
| Wednesday | 76°F | Sunny | 3 to 8 mph S | 1% |
| Wednesday Night | 44°F | Mostly Clear | 6 mph SSE | 4% |
| Thursday | 77°F | Sunny | 5 to 8 mph S | 1% |
| Thursday Night | 43°F | Mostly Clear | 7 mph SE | 4% |
| Friday | 77°F | Mostly Sunny | 6 to 10 mph S | 3% |
| Friday Night | 43°F | Slight Chance Light Rain | 9 mph WSW | 17% |
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 Sep 19, 2026.