Chatham Weather Forecast

    • 62
    • 70

    Partly Sunny

    • 60
    • 73

    Partly Sunny

    • 60
    • 75

    Mostly Sunny

    • 62
    • 76

    Mostly Sunny

    • 63
    • 77

    Partly Sunny

    • 55
    • 76

    Chance Rain Showers

Today 29 Aug Central Cook

Partly cloudy. Highs in the lower 70s Inland, but only in the upper 60s near the lake. Northeast Winds 5 to 10 Mph.

Tonight 29 Aug Central Cook

Partly cloudy. A slight chance of Showers after midnight. Lows in the lower 60s. East Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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Chatham Temperature Statistics

August Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 24 August, 2025

    60.1 °F

  • Average August

    77.4 °F

  • Highest 16 August, 2025

    93.9 °F

Climate (2020–Present)

Chicago, Chicago Midway Airport (7.5 miles)

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  • Average Low 2020–2025

    46.7 °F

  • Average 2020–2025

    54.3 °F

  • Average High 2020–2025

    61.9 °F
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