Chatham Weather Forecast

    • 56
    • 63

    Chance Rain Showers

    • 59
    • 67

    Chance Rain Showers

    • 64
    • 80

    Partly Sunny

    • 65
    • 74

    Partly Sunny

    • 63
    • 74

    Mostly Cloudy

    • 59
    • 71

    Partly Sunny

Today 23 May Central Cook

Mostly cloudy. Highs around 70 Inland, but only around 60 near the lake. Northeast Winds 5 to 10 Mph.

Tonight 23 May Central Cook

Mostly cloudy. A slight chance of Showers in the late evening and early morning. A chance of Showers with a slight chance of Thunderstorms late. Lows in the mid 50s. East Winds 5 to 10 Mph. Chance of precipitation 40 percent.

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Chatham Temperature Statistics

May Temperature

Chicago, Chicago Midway Airport (7.5 miles)

  • Lowest 2 May, 2026

    33.1 °F

  • Average May

    58.4 °F

  • Highest 17 May, 2026

    86 °F

Climate (2021–Present)

Chicago, Chicago Midway Airport (7.5 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    54.4 °F

  • Average High 2021–2026

    62 °F
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