Marion, MT Weather & Growing Conditions
Overnight
41°F
Patchy Smoke
Patchy smoke. Mostly clear. Low around 41, with temperatures rising to around 46 overnight. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Patchy Smoke | 0 mph | 0% |
| Tuesday | 78°F | Patchy Smoke then Sunny | 0 to 3 mph NE | 0% |
| Tuesday Night | 46°F | Mostly Clear | 0 to 3 mph WNW | 0% |
| Wednesday | 84°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 49°F | Patchy Smoke then Clear | 0 to 5 mph W | 0% |
| Thursday | 90°F | Sunny | 0 to 6 mph W | 0% |
| Thursday Night | 53°F | Mostly Clear | 0 to 6 mph W | 0% |
| Friday | 90°F | Sunny | 0 to 8 mph WSW | 0% |
| Friday Night | 53°F | Clear | 2 to 10 mph WSW | 0% |
| Saturday | 87°F | Sunny | 2 to 9 mph SW | 0% |
| Saturday Night | 51°F | Mostly Clear | 1 to 8 mph SW | 0% |
| Sunday | 84°F | Sunny | 1 to 6 mph SW | 0% |
| Sunday Night | 50°F | Mostly Clear | 0 to 6 mph WSW | 0% |
| Monday | 83°F | Sunny | 0 to 5 mph W | 0% |
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 Aug 4, 2026.