St. George Airport Weather Forecast

    • 64
    • 87

    Mostly Sunny

    • 66
    • 91

    Sunny

    • 70
    • 94

    Slight Chance Thunderstorms

    • 70
    • 92

    Chance Thunderstorms

    • 70
    • 91

    Chance Thunderstorms

    • 71
    • 91

    Chance Thunderstorms

    • 70
    • 88

    Rain Showers Likely

Today 16 Sep Dorchester

Partly sunny with a chance of Showers and Thunderstorms. Highs in the mid 80s. Chance of rain 50 percent.

Tonight 16 Sep Dorchester

Mostly clear. Lows in the mid 60s. East Winds around 5 Mph, becoming northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St. George Airport Temperature Statistics

September Temperature

Summerville Airport (16.2 miles)

  • Lowest 8 September, 2026

    69.8 °F

  • Average September

    80.6 °F

  • Highest 2 September, 2026

    95 °F

Climate (2021–2026)

Summerville Airport (16.2 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    65.8 °F

  • Average High 2021–2026

    77.1 °F
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