Swansea Weather Forecast

    • 68
    • 88

    Increasing Clouds

    • 70
    • 85

    Rain Showers

    • 66
    • 80

    Rain Showers Likely

    • 66
    • 83

    Mostly Sunny

    • 68
    • 85

    Slight Chance Thunderstorms

    • 69
    • 88

    Slight Chance Thunderstorms

Today 30 Jul St. Clair

Sunny. Highs in the upper 80s. East Winds around 5 Mph.

Tonight 30 Jul St. Clair

Clear. Lows in the mid 60s. Northeast Winds around 5 Mph.

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  • Temperature Real-Time

Swansea Temperature Statistics

July Temperature

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

  • Lowest 23 July, 2026

    63.1 °F

  • Average July

    80.3 °F

  • Highest 26 July, 2026

    98.8 °F

Climate (2021–2026)

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    68.1 °F
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