Sedan, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sedan, a community in Park County, Montana.
This Afternoon
46°F
Mostly Sunny
Mostly sunny. High near 46, with temperatures falling to around 39 in the afternoon. Wind around 0 mph.
7-day forecast for Sedan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 46°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 27°F | Partly Cloudy | 0 mph | 0% |
| Wednesday | 45°F | Mostly Sunny | 1 mph NNW | 0% |
| Wednesday Night | 27°F | Mostly Clear | 1 mph W | 0% |
| Thursday | 45°F | Mostly Sunny | 1 to 5 mph SW | 8% |
| Thursday Night | 27°F | Partly Cloudy | 3 mph WSW | 8% |
| Friday | 44°F | Sunny | 2 to 8 mph SW | 10% |
| Friday Night | 28°F | Partly Cloudy | 7 mph WSW | 10% |
| Saturday | 47°F | Mostly Sunny | 5 mph WSW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 3 mph SW | 0% |
| Sunday | 54°F | Mostly Sunny | 2 mph SW | 3% |
| Sunday Night | 33°F | Mostly Cloudy | 2 mph SW | 3% |
| Monday | 51°F | Partly Sunny | 1 mph WNW | 2% |
| Monday Night | 34°F | Mostly Cloudy | 2 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Sedan (45.963, -110.879). Updated through the day.
Growing snapshot for Sedan
Last spring frost
Jun 4
First fall frost
Sep 6
Growing season
92 days
Hardiness zone
4b
More local growing data for Sedan: nearby ZIP 59086 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Clyde Park
Cooke City
Corwin Springs
Emigrant
Gardiner
Jardine
Livingston
Pine Creek
Pray
Silver Gate
South Glastonbury
Springdale
Wilsall
Wineglass
Climate data from the nearest NOAA station, Wilsall 1S, Mt (5.1 mi from Sedan). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.