St George Weather Forecast

    • 81
    • 106

    Hot

    • 78
    • 102

    Chance Thunderstorms

    • 79
    • 103

    Hot

    • 77
    • 103

    Hot

    • 77
    • 101

    Slight Chance Thunderstorms

    • 77
    • 102

    Hot

Today 20 Aug Lower Washington County

Sunny. Highs around 106.

Tonight 20 Aug Lower Washington County

Partly cloudy. Lows around 80.

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St George Temperature Statistics

August Temperature

St George Municipal Airport (5 miles)

  • Lowest 15 August, 2026

    63 °F

  • Average August

    89.1 °F

  • Highest 1 August, 2026

    109.9 °F

Climate (2021–2026)

St George Municipal Airport (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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