Chatham Weather Forecast

    • 45
    • 63

    Sunny

    • 47
    • 66

    Mostly Sunny

    • 50
    • 66

    Mostly Sunny

    • 52
    • 69

    Mostly Sunny

    • 54
    • 69

    Mostly Sunny

    • 52
    • 68

    Mostly Sunny

    • 54
    • 68

    Partly Sunny

Today 18 Oct Central Cook

Mostly cloudy. Highs around 70.

Tonight 18 Oct Central Cook

Clear. Lows in the mid 40s. Southwest Winds 5 to 10 Mph.

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Chatham Temperature Statistics

October Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 16 October, 2026

    46 °F

  • Average October

    64.4 °F

  • Highest 12 October, 2026

    88 °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

    61.8 °F
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