McHenry Weather Forecast

    • 38
    • 67

    Slight Chance Thunderstorms

    • 50
    • 60

    Rain Showers Likely

    • 48
    • 59

    Rain Showers Likely

    • 51
    • 66

    Chance Rain Showers

    • 53
    • 67

    Chance Rain Showers

    • 52
    • 67

    Rain Showers Likely

Today 29 Oct McHenry

Mostly cloudy in the Morning, then clearing. A slight chance of Showers and Thunderstorms early in the morning. Highs in the mid 60s. West Winds around 10 Mph, becoming northwest in the afternoon. Chance of precipitation 20 percent.

Tonight 29 Oct McHenry

Clear, cooler with Lows in the upper 30s. North Winds around 5 Mph.

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McHenry Temperature Statistics

October Temperature

Chicago/Waukegan Regional Airport (21.1 miles)

  • Lowest 17 October, 2026

    36.6 °F

  • Average October

    58.1 °F

  • Highest 12 October, 2026

    86.6 °F

Climate (2021–2026)

Chicago/Waukegan Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    42.1 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    59.7 °F
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