Marion, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marion, a community in Flathead County, Montana.
Today
78°F
Patchy Smoke then Sunny
Patchy smoke before 9am. Sunny, with a high near 78. Southwest wind around 2 mph.
7-day forecast for Marion
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Patchy Smoke then Sunny | 2 mph SW | 0% |
| Tonight | 45°F | Mostly Clear | 2 mph NW | 0% |
| Wednesday | 84°F | Sunny | 0 to 3 mph W | 0% |
| Wednesday Night | 48°F | Clear | 0 to 3 mph NW | 0% |
| Thursday | 90°F | Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 51°F | Clear | 0 to 5 mph WNW | 0% |
| Friday | 90°F | Sunny | 0 to 8 mph WSW | 0% |
| Friday Night | 52°F | Mostly Clear | 1 to 9 mph WSW | 0% |
| Saturday | 86°F | Sunny | 0 to 8 mph SW | 0% |
| Saturday Night | 50°F | Mostly Clear | 0 to 7 mph SW | 0% |
| Sunday | 84°F | Sunny | 0 to 5 mph SW | 0% |
| Sunday Night | 49°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Monday | 83°F | Sunny | 0 to 3 mph WSW | 0% |
| Monday Night | 48°F | Mostly Clear | 0 to 3 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Marion (48.086, -114.680). Updated through the day.
Growing snapshot for Marion
Last spring frost
May 12
First fall frost
Sep 25
Growing season
134 days
Hardiness zone
5b
More local growing data for Marion: nearby ZIP 59920 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Creston, Mt (25.4 mi from Marion). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.