Chatham Weather Forecast

    • 19
    • 25

    Mostly Cloudy

    • 35
    • 38

    Rain

    • 18
    • 38

    Snow Likely

    • 15
    • 25

    Chance Snow

    • 5
    • 22

    Chance Snow

    • 6
    • 12

    Slight Chance Snow

Today 8 Dec Central Cook

Mostly cloudy. A slight chance of Flurries early in the morning. Highs in the mid 20s. Southeast Winds 5 to 10 Mph.

Tonight 8 Dec Central Cook

Mostly cloudy. A slight chance of snow after midnight. Blustery with Lows around 19. South Winds 5 to 10 Mph, increasing to southwest 10 to 15 Mph after midnight. Gusts up to 30 Mph. Chance of precipitation 20 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

    22.8 °F

  • Highest 6 December, 2025

    33.1 °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

    61.9 °F
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