Koosharem Reservoir Recreation Site Weather Forecast

    • 36
    • 56

    Mostly Cloudy

    • 33
    • 50

    Partly Sunny

    • 37
    • 53

    Mostly Cloudy

    • 34
    • 55

    Mostly Cloudy

    • 37
    • 53

    Mostly Cloudy

    • 33
    • 48

    Rain/Snow Likely

    • 32
    • 46

    Rain/Snow

Today 19 Dec Central Mountains

Partly cloudy. A 20 percent chance of rain and snow in the afternoon. Highs around 50.

Tonight 19 Dec Central Mountains

Mostly cloudy. A chance of snow late in the Evening, then snow likely after midnight. Little or no accumulation. Snow level near 8000 feet. Lows in the lower 30s. Chance of snow 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Koosharem Reservoir Recreation Site Temperature Statistics

December Temperature

Delta, Delta Municipal Airport (62.1 miles)

  • Lowest 1 December, 2025

    14 °F

  • Average December

    35.1 °F

  • Highest 17 December, 2025

    68 °F

Climate (2021–Present)

Delta, Delta Municipal Airport (62.1 miles)

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  • Average Low 2021–2025

    39.5 °F

  • Average 2021–2025

    53.1 °F

  • Average High 2021–2025

    66.3 °F
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