Edwardsville Weather Forecast

    • 71
    • 100

    Hot

    • 65
    • 90

    Mostly Sunny

    • 65
    • 88

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

    • 71
    • 100

    Chance Rain Showers

    • 65
    • 90

    Slight Chance Rain Showers

Today 5 Sep Madison

Sunny, hot. Near steady temperature in the upper 90s. Northwest Winds 5 to 10 Mph. Heat index Values up to 109.

Tonight 5 Sep Madison

Partly cloudy. Humid with Lows in the lower 70s. Northeast Winds around 5 Mph. Heat index Values up to 106 early in the evening.

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Edwardsville Temperature Statistics

September Temperature

St. Louis Regional Airport (6.8 miles)

  • Lowest 1 September, 2026

    70.2 °F

  • Average September

    81.9 °F

  • Highest 1 September, 2026

    98.6 °F

Climate (2021–2026)

St. Louis Regional Airport (6.8 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    66.6 °F
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