Chatham Weather Forecast

    • 70
    • 83

    Chance Rain Showers

    • 66
    • 77

    Partly Sunny

    • 67
    • 83

    Mostly Cloudy

    • 63
    • 76

    Partly Sunny

    • 62
    • 75

    Partly Sunny

    • 63
    • 76

    Partly Sunny

Today 16 Aug Central Cook

Mostly cloudy. A chance of Showers and a slight chance of Thunderstorms early in the morning. A slight chance of Showers and Thunderstorms in the afternoon. Humid. Highs in the lower 80s. West Winds 5 to 10 Mph. Chance of precipitation 40 percent.

Tonight 16 Aug Central Cook

Mostly cloudy. Humid with Lows in the upper 60s. Northwest Winds 5 to 10 Mph.

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Chatham Temperature Statistics

August Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 3 August, 2026

    63 °F

  • Average August

    75 °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

    62 °F
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