Chicago Weather Forecast

    • 59
    • 69

    Rain Showers

    • 57
    • 66

    Chance Rain Showers

    • 56
    • 64

    Mostly Cloudy

    • 56
    • 65

    Mostly Cloudy

    • 57
    • 65

    Mostly Cloudy

    • 57
    • 66

    Partly Sunny

Today 20 Sep Central Cook

Patchy fog early in the morning. A slight chance of Thunderstorms in the morning. Showers. A slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the morning. Breezy. Highs in the upper 60s. Northeast Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation near 100 percent.

Tonight 20 Sep Central Cook

Cloudy. A slight chance of Showers after midnight. A chance of Showers late. Lows in the upper 50s. Northeast Winds 15 to 20 Mph with Gusts up to 25 Mph, becoming east 10 to 15 Mph after midnight. Chance of precipitation 30 percent.

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Chicago Temperature Statistics

September Temperature

Chicago, Chicago Midway Airport (8.7 miles)

  • Lowest 14 September, 2026

    53.1 °F

  • Average September

    75.4 °F

  • Highest 2 September, 2026

    96.1 °F

Climate (2021–2026)

Chicago, Chicago Midway Airport (8.7 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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