Marion, MT Weather & Growing Conditions
Overnight
26°F
Mostly Cloudy
Mostly cloudy, with a low around 26. North northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 26°F | Mostly Cloudy | 2 mph NNW | 0% |
| Wednesday | 41°F | Mostly Sunny | 2 mph SSW | 0% |
| Wednesday Night | 27°F | Mostly Clear | 3 mph S | 1% |
| Thursday | 37°F | Partly Sunny | 6 mph SW | 9% |
| Thursday Night | 28°F | Mostly Cloudy | 7 mph SSW | 2% |
| Friday | 40°F | Partly Sunny then Slight Chance Light Rain | 7 mph SSW | 15% |
| Friday Night | 32°F | Slight Chance Rain And Snow | 5 to 8 mph SSW | 15% |
| Saturday | 46°F | Partly Sunny | 2 to 6 mph S | 3% |
| Saturday Night | 34°F | Mostly Cloudy then Chance Light Rain | 2 to 8 mph S | 28% |
| Sunday | 47°F | Chance Light Rain | 7 to 10 mph SSW | 28% |
| Sunday Night | 33°F | Mostly Cloudy | 5 to 8 mph SW | 11% |
| Monday | 43°F | Partly Sunny then Slight Chance Rain And Snow | 5 mph S | 18% |
| Monday Night | 33°F | Slight Chance Rain And Snow | 5 mph SSW | 18% |
| Tuesday | 46°F | Slight Chance Rain And Snow | 5 mph SSW | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marion, MT
Last spring frost
May 12
First fall frost
Sep 25
Growing season
134 days
Hardiness zone
5b
Explore more for Marion, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Creston, Mt (25.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.