Sun Valley, ID Weather & Growing Conditions
Tonight
34°F
Mostly Clear
Mostly clear. Low around 34, with temperatures rising to around 37 overnight. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 34°F | Mostly Clear | 5 mph N | 3% |
| Sunday | 68°F | Sunny | 1 to 6 mph NW | 3% |
| Sunday Night | 37°F | Partly Cloudy | 1 to 5 mph ENE | 2% |
| Monday | 72°F | Sunny | 2 to 7 mph E | 0% |
| Monday Night | 39°F | Partly Cloudy | 5 mph NNE | 0% |
| Tuesday | 74°F | Mostly Sunny | 2 to 7 mph E | 4% |
| Tuesday Night | 41°F | Partly Cloudy | 5 mph N | 5% |
| Wednesday | 73°F | Sunny | 5 to 9 mph W | 5% |
| Wednesday Night | 41°F | Partly Cloudy | 6 mph WNW | 3% |
| Thursday | 76°F | Sunny | 5 to 10 mph E | 0% |
| Thursday Night | 42°F | Partly Cloudy | 7 mph ENE | 1% |
| Friday | 75°F | Mostly Sunny | 5 to 10 mph ESE | 1% |
| Friday Night | 41°F | Partly Cloudy | 5 to 8 mph WNW | 8% |
| Saturday | 70°F | Mostly Sunny | 5 to 9 mph S | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sun Valley, ID
Growing season
77 days
Hardiness zone
5b
Explore more for Sun Valley, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Ketchum Rs, Id (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.