Sedan, MT Weather & Growing Conditions
Tonight
48°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 48. North northeast wind around 5 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Showers And Thunderstorms | 5 mph NNE | 99% |
| Saturday | 54°F | Showers And Thunderstorms | 6 mph NNE | 98% |
| Saturday Night | 44°F | Light Rain Likely | 0 to 6 mph N | 58% |
| Sunday | 63°F | Patchy Fog then Partly Sunny | 3 mph W | 17% |
| Sunday Night | 40°F | Partly Cloudy | 3 mph S | 3% |
| Monday | 69°F | Sunny | 1 to 5 mph SSW | 0% |
| Monday Night | 43°F | Mostly Clear | 3 mph S | 0% |
| Tuesday | 72°F | Sunny | 0 to 3 mph WSW | 0% |
| Tuesday Night | 44°F | Partly Cloudy | 2 mph SE | 2% |
| Wednesday | 72°F | Sunny | 1 to 8 mph SSW | 2% |
| Wednesday Night | 44°F | Mostly Clear | 3 mph SSE | 2% |
| Thursday | 74°F | Sunny | 2 to 6 mph S | 2% |
| Thursday Night | 45°F | Partly Cloudy | 3 mph SE | 1% |
| Friday | 74°F | Mostly Sunny | 3 to 7 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sedan, MT
Growing season
65 days
Hardiness zone
4b
Explore more for Sedan, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Lennep 5 Sw, Mt (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.