McHenry Weather Forecast

    • 56
    • 82

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

    • 60
    • 84

    Partly Sunny

    • 61
    • 80

    Chance Rain Showers

    • 61
    • 76

    Chance Rain Showers

    • 62
    • 78

    Chance Rain Showers

Today 16 Sep McHenry

Mostly sunny. Highs in the lower 80s. East Winds 5 to 10 Mph.

Tonight 16 Sep McHenry

Mostly clear. Lows in the mid 50s. East Winds 5 to 10 Mph in the Evening, becoming light and variable.

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McHenry Temperature Statistics

September Temperature

Chicago/Waukegan Regional Airport (21.1 miles)

  • Lowest 4 September, 2025

    46 °F

  • Average September

    64.1 °F

  • Highest 2 September, 2025

    79 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (21.1 miles)

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  • Average Low 2020–2025

    42.2 °F

  • Average 2020–2025

    51 °F

  • Average High 2020–2025

    59.6 °F
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