Marion, MT Weather & Growing Conditions
Today
72°F
Sunny
Sunny, with a high near 72. South southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Sunny | 3 mph SSW | 0% |
| Tonight | 48°F | Mostly Clear | 3 mph WNW | 0% |
| Wednesday | 78°F | Sunny | 1 to 5 mph WSW | 0% |
| Wednesday Night | 51°F | Patchy Smoke then Clear | 5 mph W | 0% |
| Thursday | 84°F | Sunny | 1 to 6 mph SSW | 0% |
| Thursday Night | 55°F | Mostly Clear | 1 to 8 mph WSW | 0% |
| Friday | 84°F | Sunny | 1 to 9 mph SW | 0% |
| Friday Night | 56°F | Clear | 5 to 12 mph WSW | 0% |
| Saturday | 82°F | Sunny | 5 to 9 mph SW | 0% |
| Saturday Night | 54°F | Mostly Clear | 3 to 9 mph WSW | 0% |
| Sunday | 79°F | Sunny | 6 mph WSW | 0% |
| Sunday Night | 52°F | Mostly Clear | 6 mph WNW | 0% |
| Monday | 78°F | Sunny | 5 mph WNW | 0% |
| Monday Night | 52°F | Mostly Clear | 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marion, MT
Last spring frost
May 12
First fall frost
Sep 25
Growing season
134 days
Hardiness zone
5b
Explore more for Marion, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Creston, Mt (25.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.