St. George Airport Weather Forecast

    • 64
    • 87

    Decreasing Clouds

    • 66
    • 90

    Slight Chance Thunderstorms

    • 66
    • 89

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

    • 67
    • 86

    Slight Chance Thunderstorms

    • 68
    • 85

    Slight Chance Thunderstorms

    • 68
    • 87

    Slight Chance Thunderstorms

Today 17 Sep Dorchester

Mostly sunny. Highs in the mid 80s. West Winds around 5 Mph.

Tonight 17 Sep Dorchester

Mostly cloudy this Evening, then becoming partly cloudy. Lows in the mid 60s. South Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St. George Airport Temperature Statistics

September Temperature

Summerville Airport (16.2 miles)

  • Lowest 15 September, 2025

    57.2 °F

  • Average September

    73.1 °F

  • Highest 5 September, 2025

    93.2 °F

Climate (2020–Present)

Summerville Airport (16.2 miles)

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  • Average Low 2020–2025

    56.4 °F

  • Average 2020–2025

    65.9 °F

  • Average High 2020–2025

    76.8 °F
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