Hermosa Weather Forecast

    • 75
    • 91

    Chance Thunderstorms

    • 67
    • 83

    Partly Sunny

    • 66
    • 78

    Partly Sunny

    • 67
    • 80

    Mostly Cloudy

    • 72
    • 84

    Chance Rain Showers

    • 71
    • 88

    Chance Rain Showers

Today 4 Sep Central Cook

Partly cloudy early in the afternoon then clearing. A slight chance of Showers and Thunderstorms early in the afternoon. Highs in the lower 90s. East Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming south in the afternoon. Chance of precipitation 20 percent. Heat index Values up to 100 in the afternoon.

Tonight 4 Sep Central Cook

Partly cloudy. A slight chance of Showers and Thunderstorms late in the evening. A chance of Showers and Thunderstorms after Midnight, then a slight chance of Showers and Thunderstorms late. Patchy fog late. Humid with Lows in the mid 70s. West Winds around 5 Mph. Chance of precipitation 30 percent.

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Hermosa Temperature Statistics

September Temperature

Chicago, Chicago Midway Airport (9.3 miles)

  • Lowest 1 September, 2026

    78.1 °F

  • Average September

    85.8 °F

  • Highest 2 September, 2026

    96.1 °F

Climate (2021–2026)

Chicago, Chicago Midway Airport (9.3 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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