South Wilmington Weather Forecast

    • 56
    • 86

    Mostly Sunny

    • 59
    • 87

    Mostly Sunny

    • 61
    • 90

    Partly Sunny

    • 62
    • 86

    Chance Rain Showers

    • 62
    • 81

    Chance Thunderstorms

    • 64
    • 80

    Chance Rain Showers

Today 16 Sep Grundy

Sunny, then becoming mostly sunny. Patchy fog early in the morning. Highs in the mid 80s. East Winds 5 to 10 Mph.

Tonight 16 Sep Grundy

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph in the Evening, becoming light and variable.

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South Wilmington Temperature Statistics

September Temperature

Greater Kankakee Airport (23 miles)

  • Lowest 8 September, 2025

    41 °F

  • Average September

    63 °F

  • Highest 14 September, 2025

    86 °F

Climate (2020–Present)

Greater Kankakee Airport (23 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    61.7 °F
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