Sedan, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sedan, a community in Park County, Montana.
This Afternoon
68°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. High near 68, with temperatures falling to around 63 in the afternoon. East southeast wind around 8 mph. Chance of precipitation is 70%.
7-day forecast for Sedan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms Likely | 8 mph ESE | 66% |
| Tonight | 48°F | Showers And Thunderstorms | 2 to 8 mph SSE | 96% |
| Saturday | 54°F | Showers And Thunderstorms | 6 mph N | 96% |
| Saturday Night | 45°F | Light Rain | 0 to 6 mph NNW | 85% |
| Sunday | 63°F | Areas Of Fog then Mostly Cloudy | 0 to 3 mph W | 19% |
| Sunday Night | 44°F | Partly Cloudy | 0 to 3 mph S | 4% |
| Monday | 68°F | Sunny | 0 to 3 mph SW | 0% |
| Monday Night | 47°F | Mostly Clear | 2 mph SSW | 0% |
| Tuesday | 71°F | Mostly Sunny | 0 to 3 mph SW | 1% |
| Tuesday Night | 47°F | Partly Cloudy | 2 mph SE | 4% |
| Wednesday | 72°F | Sunny | 0 to 5 mph SW | 2% |
| Wednesday Night | 48°F | Mostly Clear | 0 to 3 mph SSE | 3% |
| Thursday | 73°F | Sunny | 0 to 3 mph SW | 2% |
| Thursday Night | 48°F | Mostly Clear | 3 mph SE | 1% |
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 Sep 19, 2026.