St. Louis Regional Airport Weather Forecast

    • 27
    • 40

    Increasing Clouds

    • 28
    • 37

    Chance Snow

    • 12
    • 35

    Chance Snow

    • 21
    • 30

    Partly Sunny

    • 33
    • 44

    Mostly Cloudy

    • 20
    • 45

    Chance Rain

Today 5 Dec Madison

Sunny. Not as cool with Highs in the lower 40s. South Winds 5 to 10 Mph.

Tonight 5 Dec Madison

Mostly cloudy and not as cool. Near steady temperature in the lower 30s. South Winds 5 to 10 Mph, becoming west after midnight.

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St. Louis Regional Airport Temperature Statistics

December Temperature

St. Louis Regional Airport (0.6 miles)

  • Lowest 3 December, 2025

    15.3 °F

  • Average December

    24.5 °F

  • Highest 3 December, 2025

    35.6 °F

Climate (2020–Present)

St. Louis Regional Airport (0.6 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    66.2 °F
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