Marion, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marion, a community in Flathead County, Montana.
Today
74°F
Sunny
Sunny, with a high near 74. East wind around 2 mph.
7-day forecast for Marion
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Sunny | 2 mph E | 3% |
| Tonight | 45°F | Partly Cloudy | 1 mph NE | 1% |
| Sunday | 75°F | Sunny | 2 mph SSW | 0% |
| Sunday Night | 45°F | Mostly Clear | 1 mph WNW | 0% |
| Monday | 76°F | Sunny | 0 to 3 mph SSW | 0% |
| Monday Night | 45°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Tuesday | 74°F | Sunny | 2 mph SW | 0% |
| Tuesday Night | 45°F | Partly Cloudy | 2 mph W | 1% |
| Wednesday | 73°F | Mostly Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 45°F | Partly Cloudy | 0 to 3 mph WSW | 3% |
| Thursday | 71°F | Mostly Sunny | 0 to 3 mph SSW | 1% |
| Thursday Night | 45°F | Partly Cloudy | 2 mph WNW | 6% |
| Friday | 68°F | Partly Sunny | 0 to 3 mph SSW | 10% |
| Friday Night | 43°F | Chance Light Rain | 3 mph W | 25% |
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 Sep 19, 2026.