Marengo Weather Forecast

    • 44
    • 68

    Rain Showers

    • 65
    • 76

    Rain Showers Likely

    • 58
    • 81

    Rain Showers Likely

    • 63
    • 72

    Rain Showers

    • 60
    • 77

    Chance Rain Showers

    • 60
    • 76

    Chance Rain Showers

    • 58
    • 78

    Chance Rain Showers

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 Forecast NOAA

  • Temperature Real-Time

Marengo Temperature Statistics

September Temperature

De Kalb Taylor Municipal Airport (22.4 miles)

  • Lowest 11 September, 2026

    53.8 °F

  • Average September

    74.5 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

De Kalb Taylor Municipal Airport (22.4 miles)

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  • Average Low 2021–2026

    41.1 °F

  • Average 2021–2026

    50.3 °F

  • Average High 2021–2026

    59.5 °F
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