Southern Illinois University Edwardsville Weather Forecast

    • 37
    • 48

    Increasing Clouds

    • 26
    • 45

    Breezy

    • 26
    • 37

    Slight Chance Snow

    • 13
    • 34

    Mostly Cloudy

    • 13
    • 23

    Mostly Cloudy

    • 19
    • 28

    Partly Sunny

Today 9 Dec Madison

Mostly sunny. Not as cool with Highs in the lower 50s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Dec Madison

Mostly cloudy and not as cool. Near steady temperature in the mid 40s. Southwest Winds around 15 Mph with Gusts up to 30 Mph.

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Southern Illinois University Edwardsville Temperature Statistics

December Temperature

St. Louis Regional Airport (6.8 miles)

  • Lowest 5 December, 2025

    4.5 °F

  • Average December

    24.4 °F

  • Highest 6 December, 2025

    42.8 °F

Climate (2020–Present)

St. Louis Regional Airport (6.8 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    66.2 °F
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