New Lenox Weather Forecast

    • 43
    • 69

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 56
    • 78

    Partly Sunny

    • 59
    • 83

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 57
    • 81

    Partly Sunny

Today 7 Sep Northern Will

Mostly sunny. Highs in the upper 60s. Northwest Winds 5 to 10 Mph.

Tonight 7 Sep Northern Will

Mostly clear. Lows in the lower 40s. North Winds around 5 Mph in the Evening, becoming light and variable.

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New Lenox Temperature Statistics

September Temperature

Lewis University Airport (9.3 miles)

  • Lowest 4 September, 2025

    48.2 °F

  • Average September

    62.1 °F

  • Highest 2 September, 2025

    78.8 °F

Climate (2020–Present)

Lewis University Airport (9.3 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    61.7 °F
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