Portage Park Weather Forecast

    • 65
    • 84

    Mostly Sunny

    • 67
    • 83

    Chance Rain Showers

    • 65
    • 79

    Chance Thunderstorms

    • 64
    • 78

    Rain Showers Likely

    • 64
    • 77

    Chance Rain Showers

    • 63
    • 74

    Chance Rain Showers

    • 61
    • 72

    Slight Chance Thunderstorms

Today 18 Sep Central Cook

Mostly sunny. Highs in the mid 80s Inland, but only around 80 near the lake. East Winds 5 to 10 Mph.

Tonight 18 Sep Central Cook

Mostly clear. Lows in the mid 60s. East Winds around 5 Mph.

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Portage Park Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2025

    46.9 °F

  • Average September

    66.6 °F

  • Highest 12 September, 2025

    84 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    61.7 °F
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