McHenry Weather Forecast

    • 39
    • 59

    Decreasing Clouds

    • 36
    • 58

    Mostly Sunny

    • 41
    • 62

    Mostly Sunny

    • 45
    • 66

    Mostly Sunny

    • 49
    • 68

    Mostly Sunny

    • 47
    • 69

    Mostly Sunny

Today 27 Sep McHenry

Mostly sunny. Highs in the upper 50s. Northwest Winds 10 to 15 Mph.

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  • Temperature Real-Time

McHenry Temperature Statistics

September Temperature

Chicago/Waukegan Regional Airport (21.1 miles)

  • Lowest 23 September, 2022

    45 °F
  • Average September

    67.1 °F
  • Highest 1 September, 2022

    87.1 °F

Climate (2010–Present)

Chicago/Waukegan Regional Airport (21.1 miles)

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  • Average Low 2010–Present

    42.2 °F
  • Average 2010–Present

    50.6 °F
  • Average High 2010–Present

    58.6 °F
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