St George Weather Forecast

    • 67
    • 97

    Hot

    • 70
    • 95

    Chance Rain Showers

    • 69
    • 89

    Chance Rain Showers

    • 69
    • 91

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

    • 69
    • 96

    Mostly Sunny

    • 70
    • 98

    Hot

Today 17 Sep Lower Washington County

Sunny. Highs in the upper 90s.

Tonight 17 Sep Lower Washington County

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 60s.

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  • Temperature Real-Time

St George Temperature Statistics

September Temperature

St George Municipal Airport (5 miles)

  • Lowest 12 September, 2025

    63 °F

  • Average September

    81 °F

  • Highest 1 September, 2025

    102 °F

Climate (2020–Present)

St George Municipal Airport (5 miles)

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  • Average Low 2020–2025

    52.3 °F

  • Average 2020–2025

    64.3 °F

  • Average High 2020–2025

    76.5 °F
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