Koosharem Reservoir Recreation Site Weather Forecast

    • 48
    • 73

    Slight Chance Thunderstorms

    • 51
    • 78

    Slight Chance Thunderstorms

    • 53
    • 81

    Chance Thunderstorms

    • 55
    • 81

    Chance Thunderstorms

Today 7 Sep Central Mountains

Sunny. Highs in the upper 60s.

Tonight 7 Sep Central Mountains

Mostly clear. Lows in the mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Koosharem Reservoir Recreation Site Temperature Statistics

September Temperature

Delta, Delta Municipal Airport (62.1 miles)

  • Lowest 1 September, 2026

    51.8 °F

  • Average September

    69.8 °F

  • Highest 3 September, 2026

    86 °F

Climate (2021–2026)

Delta, Delta Municipal Airport (62.1 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    66.4 °F
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