McHenry Weather Forecast

    • 61
    • 80

    Rain Showers

    • 49
    • 68

    Mostly Cloudy

    • 45
    • 65

    Partly Sunny

    • 47
    • 65

    Slight Chance Rain

    • 45
    • 74

    Slight Chance Rain Showers

    • 45
    • 68

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

Today 20 Sep McHenry

Cloudy with a 40 percent chance of Showers and Thunderstorms. Muggy. Highs in the upper 70s. South Winds 10 to 15 Mph.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

McHenry Temperature Statistics

September Temperature

Chicago/Waukegan Regional Airport (21.1 miles)

  • Lowest 16 September, 2021

    50 °F
  • Average September

    69.4 °F
  • Highest 17 September, 2021

    91 °F

Climate (2010–Present)

Chicago/Waukegan Regional Airport (21.1 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2010–Present

    41.6 °F
  • Average 2010–Present

    49.9 °F
  • Average High 2010–Present

    57.8 °F
Get an account to remove ads