St. Clair County International Airport Weather Forecast

    • 26
    • 50

    Rain Showers

    • 18
    • 30

    Snow Showers

    • 16
    • 37

    Slight Chance Snow

    • 12
    • 25

    Partly Sunny

    • 23
    • 32

    Mostly Cloudy

    • 25
    • 40

    Mostly Cloudy

Today 18 Dec St. Clair

Breezy. Cloudy with Showers. Highs in the upper 40s. South Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of rain 90 percent.

Tonight 18 Dec St. Clair

Rain Showers in the Evening, then numerous snow Showers after midnight. Accumulations up to half an inch. Lows in the mid 20s. Southwest Winds 10 to 20 Mph. Gusts up to 40 Mph, decreasing to 30 Mph after midnight. Chance of precipitation near 100 percent.

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St. Clair County International Airport Temperature Statistics

December Temperature

St Clair County International Airport (0 miles)

  • Lowest 14 December, 2025

    -0.4 °F

  • Average December

    22.8 °F

  • Highest 9 December, 2025

    35.6 °F

Climate (2020–Present)

St Clair County International Airport (0 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    49.5 °F

  • Average High 2020–2025

    58.7 °F
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