Marion, MT Weather & Growing Conditions
Today
67°F
Sunny
Sunny, with a high near 67. Southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Sunny | 2 mph SE | 2% |
| Tonight | 46°F | Partly Cloudy | 3 mph SSE | 1% |
| Sunday | 69°F | Sunny | 3 mph S | 0% |
| Sunday Night | 46°F | Mostly Clear | 2 mph SW | 0% |
| Monday | 70°F | Sunny | 3 mph S | 0% |
| Monday Night | 47°F | Mostly Clear | 1 to 5 mph WSW | 0% |
| Tuesday | 69°F | Sunny | 3 mph S | 0% |
| Tuesday Night | 47°F | Partly Cloudy | 3 mph WSW | 1% |
| Wednesday | 67°F | Mostly Sunny | 1 to 6 mph SSW | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 5 mph WSW | 3% |
| Thursday | 66°F | Mostly Sunny | 5 mph SSW | 1% |
| Thursday Night | 46°F | Partly Cloudy | 3 mph NW | 7% |
| Friday | 63°F | Partly Sunny | 5 mph NNE | 10% |
| Friday Night | 43°F | Chance Light Rain | 6 mph W | 26% |
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 Sep 19, 2026.