McHenry Weather Forecast

    • 45
    • 70

    Becoming Sunny

    • 64
    • 74

    Chance Thunderstorms

    • 57
    • 82

    Rain Showers Likely

    • 62
    • 70

    Rain Showers Likely

    • 60
    • 76

    Chance Rain Showers

    • 60
    • 74

    Chance Rain Showers

    • 58
    • 77

    Rain Showers Likely

Today 13 Sep McHenry

Mostly cloudy. Scattered Showers. Temperatures in the lower 60s. Northwest Winds 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 13 Sep McHenry

Mostly clear. Patchy fog late. Lows in the mid 40s. Northwest Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

McHenry Temperature Statistics

September Temperature

Chicago/Waukegan Regional Airport (21.1 miles)

  • Lowest 11 September, 2026

    55.9 °F

  • Average September

    74 °F

  • Highest 1 September, 2026

    93.7 °F

Climate (2021–2026)

Chicago/Waukegan Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    59.7 °F
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