Sun Valley, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sun Valley, a city in Blaine County, Idaho.
Today
80°F
Patchy Smoke
Patchy smoke. Sunny. High near 80, with temperatures falling to around 78 in the afternoon. Southwest wind 2 to 10 mph.
7-day forecast for Sun Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Patchy Smoke | 2 to 10 mph SW | 0% |
| Tonight | 43°F | Areas Of Smoke | 7 to 10 mph NW | 0% |
| Wednesday | 84°F | Areas Of Smoke | 3 to 10 mph W | 0% |
| Wednesday Night | 47°F | Mostly Clear | 7 to 10 mph NW | 0% |
| Thursday | 90°F | Sunny | 5 to 12 mph NW | 0% |
| Thursday Night | 52°F | Clear | 6 to 12 mph WNW | 0% |
| Friday | 91°F | Sunny | 6 to 13 mph WNW | 0% |
| Friday Night | 52°F | Mostly Clear | 7 to 14 mph WNW | 0% |
| Saturday | 90°F | Sunny | 5 to 14 mph WNW | 0% |
| Saturday Night | 53°F | Mostly Clear | 6 to 14 mph NW | 0% |
| Sunday | 88°F | Sunny | 5 to 15 mph W | 0% |
| Sunday Night | 51°F | Mostly Clear | 6 to 14 mph WNW | 0% |
| Monday | 87°F | Sunny | 5 to 14 mph W | 0% |
| Monday Night | 51°F | Mostly Clear | 6 to 14 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Sun Valley (43.684, -114.334). Updated through the day.
Growing snapshot for Sun Valley
Growing season
77 days
Hardiness zone
5b
More local growing data for Sun Valley: 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 Sun Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.