Sun Valley Weather Forecast

    • 40
    • 73

    Partly Sunny

    • 39
    • 75

    Rain Showers

    • 33
    • 62

    Rain Showers Likely

    • 39
    • 71

    Partly Sunny

    • 44
    • 75

    Slight Chance Rain

    • 43
    • 76

    Chance Rain

Today 5 Sep Sun Valley Region

Sunny. A slight chance of Showers and Thunderstorms in the afternoon. Warmer. Highs 65 to 74.

Tonight 5 Sep Sun Valley Region

Partly cloudy. Lows 38 to 48.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sun Valley Temperature Statistics

September Temperature

Hailey, Friedman Memorial Airport (13.7 miles)

  • Lowest 1 September, 2026

    46.4 °F

  • Average September

    57.5 °F

  • Highest 1 September, 2026

    77 °F

Climate (2021–2026)

Hailey, Friedman Memorial Airport (13.7 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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