Ivins Reservoir Weather Forecast

    • 74
    • 104

    Hot

    • 74
    • 100

    Hot

    • 70
    • 98

    Hot

    • 64
    • 93

    Sunny

    • 66
    • 93

    Mostly Sunny

    • 65
    • 90

    Slight Chance Thunderstorms

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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Ivins Reservoir Temperature Statistics

September Temperature

St George Municipal Airport (14.3 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 (14.3 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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