Marion, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marion, a community in Flathead County, Montana.
This Afternoon
45°F
Sunny
Sunny. High near 45, with temperatures falling to around 40 in the afternoon. South wind around 2 mph.
7-day forecast for Marion
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 45°F | Sunny | 2 mph S | 0% |
| Tonight | 23°F | Patchy Fog then Partly Cloudy | 1 mph S | 2% |
| Thursday | 41°F | Patchy Fog then Mostly Cloudy | 1 to 5 mph SW | 10% |
| Thursday Night | 25°F | Partly Cloudy | 3 mph SSW | 2% |
| Friday | 45°F | Partly Sunny | 3 mph SSW | 0% |
| Friday Night | 29°F | Mostly Cloudy | 3 mph SW | 1% |
| Saturday | 52°F | Partly Sunny | 2 mph S | 1% |
| Saturday Night | 30°F | Partly Cloudy | 3 mph SSE | 7% |
| Sunday | 53°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SSW | 15% |
| Sunday Night | 29°F | Slight Chance Light Rain then Patchy Fog | 0 to 6 mph WSW | 15% |
| Monday | 48°F | Areas Of Fog then Mostly Cloudy | 2 mph SSE | 6% |
| Monday Night | 28°F | Patchy Fog | 1 mph SSW | 9% |
| Tuesday | 50°F | Patchy Fog then Slight Chance Light Rain | 2 mph SSW | 18% |
| Tuesday Night | 31°F | Slight Chance Light Rain | 2 mph SSW | 18% |
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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Martin City
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Snowslip
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West Glacier
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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 Nov 5, 2026.