Ketchum, ID Weather & Growing Conditions
Tonight
39°F
Mostly Clear
Mostly clear. Low around 39, with temperatures rising to around 41 overnight. Northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Mostly Clear | 2 mph NW | 4% |
| Sunday | 62°F | Mostly Sunny | 0 to 3 mph WSW | 4% |
| Sunday Night | 42°F | Mostly Clear | 2 mph NE | 3% |
| Monday | 65°F | Sunny | 2 to 6 mph E | 1% |
| Monday Night | 45°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Tuesday | 66°F | Mostly Sunny | 1 to 6 mph E | 9% |
| Tuesday Night | 46°F | Partly Cloudy | 1 to 5 mph NNW | 6% |
| Wednesday | 66°F | Sunny | 1 to 8 mph WNW | 5% |
| Wednesday Night | 46°F | Partly Cloudy | 2 to 7 mph WSW | 1% |
| Thursday | 67°F | Sunny | 2 to 9 mph ESE | 0% |
| Thursday Night | 48°F | Partly Cloudy | 3 to 7 mph ESE | 1% |
| Friday | 67°F | Mostly Sunny | 3 to 9 mph SE | 2% |
| Friday Night | 46°F | Mostly Cloudy | 2 to 8 mph SE | 7% |
| Saturday | 62°F | Mostly Sunny | 2 to 8 mph S | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ketchum, ID
Growing season
77 days
Hardiness zone
5b
Explore more for Ketchum, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Ketchum Rs, Id (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.