Koosharem Reservoir Weather Forecast

    • 50
    • 77

    Mostly Sunny

    • 53
    • 82

    Mostly Sunny

    • 55
    • 85

    Partly Sunny

    • 56
    • 86

    Slight Chance Thunderstorms

    • 56
    • 85

    Chance Thunderstorms

    • 50
    • 82

    Chance Thunderstorms

Today 7 Sep Upper Sevier River Valleys

Sunny, warmer. Highs in the upper 70s.

Tonight 7 Sep Upper Sevier River Valleys

Mostly clear. Lows in the upper 40s.

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  • Temperature Real-Time

Koosharem Reservoir Temperature Statistics

September Temperature

Bryce Canyon Airport (64 miles)

  • Lowest 3 September, 2026

    33.1 °F

  • Average September

    59.5 °F

  • Highest 4 September, 2026

    73 °F

Climate (2021–2026)

Bryce Canyon Airport (64 miles)

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  • Average Low 2021–2026

    28.4 °F

  • Average 2021–2026

    44.4 °F

  • Average High 2021–2026

    58.9 °F
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