South Wilmington Weather Forecast

    • 19
    • 43

    Becoming Sunny

    • 21
    • 33

    Increasing Clouds

    • 37
    • 43

    Mostly Cloudy

    • 31
    • 47

    Mostly Cloudy

    • 48
    • 48

    Rain Likely

    • 40
    • 60

    Mostly Cloudy

    • 34
    • 52

    Mostly Cloudy

Today 20 Dec Grundy

Mostly cloudy. Breezy. Highs in the lower 40s. Southwest Winds 15 to 20 Mph, becoming west 10 to 15 Mph in the afternoon. Gusts up to 30 Mph.

Tonight 20 Dec Grundy

Clear. Lows around 19. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

South Wilmington Temperature Statistics

December Temperature

Greater Kankakee Airport (23 miles)

  • Lowest 18 December, 2025

    19.4 °F

  • Average December

    37.6 °F

  • Highest 18 December, 2025

    50.9 °F

Climate (2020–Present)

Greater Kankakee Airport (23 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    62.2 °F
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