Gunlock Reservoir Weather Forecast

    • 71
    • 101

    Hot

    • 70
    • 97

    Hot

    • 68
    • 95

    Sunny

    • 61
    • 90

    Sunny

    • 64
    • 89

    Mostly Sunny

    • 63
    • 87

    Sunny

Today 10 Sep Lower Washington County

Sunny. Highs around 104.

Tonight 10 Sep Lower Washington County

Mostly clear. Lows in the mid 70s.

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Gunlock Reservoir Temperature Statistics

September Temperature

St George Municipal Airport (20.5 miles)

  • Lowest 7 September, 2026

    62.1 °F

  • Average September

    80.1 °F

  • Highest 5 September, 2026

    97 °F

Climate (2021–2026)

St George Municipal Airport (20.5 miles)

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  • Average Low 2021–2026

    53 °F

  • Average 2021–2026

    64.8 °F

  • Average High 2021–2026

    76.8 °F
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