Swansea Weather Forecast

    • 55
    • 65

    Increasing Clouds

    • 22
    • 66

    Rain

    • 15
    • 29

    Blustery

    • 32
    • 37

    Chance Rain/Snow

    • 41
    • 65

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 49
    • 73

    Partly Sunny

Today 14 Mar St. Clair

Sunny. Highs in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 14 Mar St. Clair

Mostly clear this Evening, then becoming mostly cloudy. Not as cool with Lows in the mid 50s. Southeast Winds around 10 Mph with Gusts up to 20 Mph, becoming south 15 to 20 Mph with Gusts up to 30 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Swansea Temperature Statistics

March Temperature

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

  • Lowest 1 March, 2026

    30 °F

  • Average March

    52.8 °F

  • Highest 10 March, 2026

    84.9 °F

Climate (2021–Present)

Belleville, Scott AFB/MidAmerica Airport (7.5 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    67.8 °F
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