O'Hare Weather Forecast

    • 65
    • 76

    Thunderstorms

    • 64
    • 74

    Thunderstorms

    • 65
    • 80

    Thunderstorms

    • 60
    • 71

    Chance Rain Showers

    • 58
    • 70

    Chance Rain Showers

    • 58
    • 69

    Chance Rain Showers

Today 17 Sep Central Cook

Mostly cloudy. Patchy fog early in the morning. Showers and a slight chance of Thunderstorms early in the Morning, then a chance of Showers late in the morning. Humid. Highs in the mid 70s. North Winds 5 to 10 Mph. Chance of precipitation 80 percent.

Tonight 17 Sep Central Cook

Mostly cloudy. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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O'Hare Temperature Statistics

September Temperature

Chicago, Chicago-O'Hare International Airport (3.1 miles)

  • Lowest 14 September, 2026

    53.1 °F

  • Average September

    76.4 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago, Chicago-O'Hare International Airport (3.1 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61.9 °F
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