Chatham Weather Forecast

    • 60
    • 74

    Mostly Sunny

    • 60
    • 75

    Mostly Sunny

    • 66
    • 80

    Partly Sunny

    • 67
    • 83

    Chance Rain Showers

    • 66
    • 80

    Slight Chance Thunderstorms

    • 66
    • 78

    Partly Sunny

Today 23 Aug Central Cook

Mostly sunny in the Morning, then becoming partly cloudy. Highs in the mid 70s. Northwest Winds 5 to 10 Mph.

Tonight 23 Aug Central Cook

Mostly clear. Lows in the upper 50s. Northwest Winds 5 to 10 Mph, becoming west after midnight.

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Chatham Temperature Statistics

August Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 3 August, 2026

    63 °F

  • Average August

    74.8 °F

  • Highest 10 August, 2026

    87.1 °F

Climate (2021–2026)

Chicago, Chicago Midway Airport (7.5 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    61.9 °F
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