Sun Valley Weather Forecast
- 46
- 75
Increasing Clouds
- 46
- 76
Mostly Cloudy
- 45
- 75
Partly Sunny
- 40
- 73
Mostly Sunny
- 43
- 76
Sunny
- 46
- 78
Mostly Sunny
Today 18 Sep Sun Valley Region
Sunny. Highs 67 to 77.
Tonight 18 Sep Sun Valley Region
Mostly cloudy. Lows 43 to 53.
Sun Valley Temperature Statistics
September Temperature
Hailey, Friedman Memorial Airport (13.7 miles)
Lowest 13 September, 2025
42.8 °FAverage September
59.3 °FHighest 3 September, 2025
89.6 °F
Climate (2020–Present)
Hailey, Friedman Memorial Airport (13.7 miles)
Average Low 2020–2025
33.9 °FAverage 2020–2025
42.2 °FAverage High 2020–2025
55.9 °F