Chatham Weather Forecast

    • 50
    • 72

    Sunny

    • 49
    • 64

    Mostly Sunny

    • 55
    • 69

    Mostly Sunny

    • 53
    • 70

    Partly Sunny

    • 53
    • 68

    Partly Sunny

    • 53
    • 66

    Mostly Sunny

Today 4 Oct Central Cook

Sunny. Highs in the lower 70s. Temperature falling into the upper 60s in the afternoon. Northwest Winds around 10 Mph.

Tonight 4 Oct Central Cook

Clear. Lows in the upper 40s. Northwest Winds 5 to 10 Mph.

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Chatham Temperature Statistics

October Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 2 October, 2026

    55 °F

  • Average October

    63.2 °F

  • Highest 1 October, 2026

    71.1 °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

    61.8 °F
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