Ketchum, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ketchum, a city in Blaine County, Idaho.
This Afternoon
47°F
Mostly Cloudy
Mostly cloudy. High near 47, with temperatures falling to around 43 in the afternoon. Southeast wind 0 to 5 mph.
7-day forecast for Ketchum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Mostly Cloudy | 0 to 5 mph SE | 0% |
| Tonight | 28°F | Mostly Cloudy | 2 to 6 mph NNW | 1% |
| Wednesday | 52°F | Mostly Sunny | 0 to 7 mph SE | 1% |
| Wednesday Night | 26°F | Patchy Fog | 3 mph N | 0% |
| Thursday | 46°F | Partly Sunny then Areas Of Fog | 5 mph SW | 6% |
| Thursday Night | 23°F | Areas Of Fog | 6 mph WNW | 2% |
| Friday | 49°F | Mostly Sunny | 2 to 6 mph SW | 1% |
| Friday Night | 27°F | Partly Cloudy | 5 mph NW | 1% |
| Saturday | 53°F | Sunny | 1 to 5 mph SSE | 0% |
| Saturday Night | 31°F | Partly Cloudy | 3 mph NNE | 0% |
| Sunday | 55°F | Mostly Sunny | 2 to 6 mph W | 0% |
| Sunday Night | 31°F | Partly Cloudy | 3 mph NNW | 0% |
| Monday | 55°F | Mostly Sunny | 5 mph S | 2% |
| Monday Night | 31°F | Partly Cloudy | 5 mph NW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Ketchum (43.688, -114.380). Updated through the day.
Growing snapshot for Ketchum
Growing season
77 days
Hardiness zone
5b
More local growing data for Ketchum: nearby ZIP 83353 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ketchum Rs, Id (1.8 mi from Ketchum). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.