Wilmington Weather Forecast

    • 54
    • 77

    Mostly Cloudy

    • 57
    • 81

    Partly Sunny

    • 58
    • 85

    Mostly Sunny

    • 63
    • 89

    Partly Sunny

    • 64
    • 89

    Slight Chance Thunderstorms

    • 64
    • 89

    Partly Sunny

    • 62
    • 87

    Partly Sunny

Today 9 Sep Southern Will

Partly cloudy in the Morning, then becoming mostly cloudy. Highs in the upper 70s. South Winds 5 to 10 Mph.

Tonight 9 Sep Southern Will

Mostly cloudy. Lows in the mid 50s. Southeast Winds around 5 Mph.

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Wilmington Temperature Statistics

September Temperature

Joliet Regional Airport (14.3 miles)

  • Lowest 7 September, 2025

    40.1 °F

  • Average September

    61.3 °F

  • Highest 2 September, 2025

    80.6 °F

Climate (2020–Present)

Joliet Regional Airport (14.3 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    53.5 °F

  • Average High 2020–2025

    63 °F
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