Pontoon Beach Weather Forecast

    • 26
    • 34

    Decreasing Clouds

    • 43
    • 52

    Partly Sunny

    • 26
    • 47

    Mostly Cloudy

    • 19
    • 36

    Slight Chance Snow

    • 6
    • 27

    Mostly Cloudy

    • 8
    • 21

    Mostly Cloudy

Today 8 Dec Madison

Partly sunny in the Morning, then clearing. Highs in the mid 30s. North Winds around 5 Mph, becoming west around 5 Mph in the afternoon.

Tonight 8 Dec Madison

Cloudy and much cooler. Near steady temperature in the lower 20s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Pontoon Beach Temperature Statistics

December Temperature

St. Louis Regional Airport (11.2 miles)

  • Lowest 5 December, 2025

    4.5 °F

  • Average December

    22.1 °F

  • Highest 5 December, 2025

    37.4 °F

Climate (2020–Present)

St. Louis Regional Airport (11.2 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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