Upper Box Canyon Lake Weather Forecast

    • 29
    • 47

    Mostly Sunny

    • 33
    • 54

    Mostly Sunny

    • 38
    • 61

    Mostly Sunny

    • 40
    • 61

    Partly Sunny

    • 36
    • 56

    Partly Sunny

    • 32
    • 52

    Partly Sunny

    • 30
    • 44

    Partly Sunny

Today 7 Sep Sun Valley Region

Sunny. Highs 58 to 66.

Tonight 7 Sep Sun Valley Region

Mostly clear. Lows 29 to 39.

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Upper Box Canyon Lake Temperature Statistics

September Temperature

Hailey, Friedman Memorial Airport (19.3 miles)

  • Lowest 3 September, 2026

    42.8 °F

  • Average September

    56 °F

  • Highest 1 September, 2026

    77 °F

Climate (2021–2026)

Hailey, Friedman Memorial Airport (19.3 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    43.3 °F

  • Average High 2021–2026

    56.7 °F
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