Chatham Weather Forecast

    • 25
    • 29

    Chance Snow

    • 10
    • 31

    Chance Snow

    • 0
    • 14

    Chance Snow

    • 3
    • 12

    Partly Sunny

    • 17
    • 23

    Mostly Cloudy

    • 30
    • 34

    Mostly Cloudy

Today 11 Dec Central Cook

Mostly cloudy. Highs in the upper 20s. West Winds 5 to 10 Mph.

Tonight 11 Dec Central Cook

Cloudy. A chance of snow until early morning. A slight chance of snow Showers late. Snow accumulation up to an inch possible. Near steady temperature in the mid 20s. Southeast Winds around 5 Mph, becoming northeast after midnight. Chance of precipitation 50 percent.

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Chatham Temperature Statistics

December Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 4 December, 2025

    9 °F

  • Average December

    24.1 °F

  • Highest 9 December, 2025

    37 °F

Climate (2020–Present)

Chicago, Chicago Midway Airport (7.5 miles)

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  • Average Low 2020–2025

    46.8 °F

  • Average 2020–2025

    54.3 °F

  • Average High 2020–2025

    61.8 °F
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