Ketchum Weather Forecast

    • 43
    • 75

    Mostly Sunny

    • 39
    • 74

    Partly Sunny

    • 40
    • 67

    Partly Sunny

    • 39
    • 67

    Slight Chance Rain

    • 33
    • 63

    Mostly Sunny

    • 34
    • 63

    Mostly Sunny

Today 24 Sep Sun Valley Region

Sunny. Highs 66 to 76.

Tonight 24 Sep Sun Valley Region

Mostly clear. Lows 39 to 49.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ketchum Temperature Statistics

September Temperature

Hailey, Friedman Memorial Airport (12.4 miles)

  • Lowest 14 September, 2026

    33.8 °F

  • Average September

    54.3 °F

  • Highest 9 September, 2026

    78.8 °F

Climate (2021–2026)

Hailey, Friedman Memorial Airport (12.4 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    43.3 °F

  • Average High 2021–2026

    56.6 °F
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