Upper Box Canyon Lake Weather Forecast
- 48
- 68
Slight Chance Thunderstorms
- 52
- 71
Mostly Sunny
- 46
- 71
Mostly Sunny
- 46
- 69
Mostly Sunny
- 50
- 71
Mostly Sunny
- 51
- 72
Slight Chance Thunderstorms
- 48
- 68
Chance Rain Showers
Today 18 Aug Sun Valley Region
Sunny. A slight chance of Showers and Thunderstorms in the afternoon. Highs 78 to 87.
Tonight 18 Aug Sun Valley Region
Mostly clear. Lows 49 to 59.
Upper Box Canyon Lake Temperature Statistics
August Temperature
Hailey, Friedman Memorial Airport (19.3 miles)
Lowest 8 August, 2025
44.6 °FAverage August
64.2 °FHighest 12 August, 2025
89.6 °F
Climate (2020–Present)
Hailey, Friedman Memorial Airport (19.3 miles)
Average Low 2020–2025
33.9 °FAverage 2020–2025
42.2 °FAverage High 2020–2025
55.9 °F