Brookside Weather Forecast

    • 63
    • 70

    Chance Rain Showers

    • 61
    • 81

    Mostly Sunny

    • 57
    • 85

    Mostly Sunny

    • 58
    • 76

    Mostly Sunny

    • 59
    • 76

    Partly Sunny

    • 61
    • 78

    Partly Sunny

    • 62
    • 81

    Partly Sunny

Today 17 Sep New Castle

Showers likely with a chance of Thunderstorms. Near steady temperature in the upper 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 17 Sep New Castle

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers after midnight. Humid with Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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Brookside Temperature Statistics

September Temperature

Wilmington, New Castle County Airport (6.2 miles)

  • Lowest 9 September, 2025

    53.1 °F

  • Average September

    70.4 °F

  • Highest 6 September, 2025

    91 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (6.2 miles)

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  • Average Low 2020–2025

    48.1 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    66.6 °F
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