Marion, MT Weather & Growing Conditions
Overnight
46°F
Mostly Cloudy
Mostly cloudy, with a low around 46. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Cloudy | 0 mph | 1% |
| Saturday | 74°F | Sunny | 2 mph E | 2% |
| Saturday Night | 45°F | Partly Cloudy | 2 mph S | 2% |
| Sunday | 75°F | Sunny | 2 mph WSW | 0% |
| Sunday Night | 45°F | Mostly Clear | 1 mph NW | 0% |
| Monday | 76°F | Sunny | 0 to 3 mph SW | 0% |
| Monday Night | 46°F | Mostly Clear | 0 to 3 mph W | 0% |
| Tuesday | 75°F | Sunny | 0 to 3 mph WSW | 0% |
| Tuesday Night | 46°F | Partly Cloudy | 0 to 3 mph W | 1% |
| Wednesday | 73°F | Mostly Sunny | 0 to 5 mph SSW | 0% |
| Wednesday Night | 45°F | Partly Cloudy | 3 mph WSW | 1% |
| Thursday | 72°F | Mostly Sunny | 0 to 3 mph SW | 1% |
| Thursday Night | 45°F | Partly Cloudy | 2 mph WSW | 6% |
| Friday | 69°F | Partly Sunny | 1 to 5 mph S | 10% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marion, MT
Growing season
44 days
Hardiness zone
4b
Explore more for Marion, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Libby 32 Sse, Mt (18.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.