Portage Park Weather Forecast

    • 67
    • 79

    Clearing Late

    • 65
    • 76

    Mostly Sunny

    • 66
    • 78

    Partly Sunny

    • 74
    • 87

    Mostly Cloudy

    • 68
    • 88

    Partly Sunny

    • 64
    • 80

    Partly Sunny

Today 5 Sep Central Cook

Mostly cloudy in the Morning, then becoming partly cloudy. Patchy fog early in the morning. Highs in the lower 80s Inland, but only in the mid 70s near the lake. North Winds 5 to 10 Mph, increasing to northeast 10 to 15 Mph in the afternoon.

Tonight 5 Sep Central Cook

Partly cloudy in the Evening, then clearing. Lows in the upper 60s. Northeast Winds 5 to 10 Mph.

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Portage Park Temperature Statistics

September Temperature

Chicago, Chicago-O'Hare International Airport (7.5 miles)

  • Lowest 1 September, 2026

    77.6 °F

  • Average September

    85.8 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago, Chicago-O'Hare International Airport (7.5 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    61.9 °F
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