Brookside Weather Forecast

    • 72
    • 91

    Rain Showers Likely

    • 67
    • 88

    Chance Thunderstorms

    • 62
    • 81

    Mostly Sunny

    • 59
    • 79

    Mostly Sunny

    • 60
    • 80

    Partly Sunny

    • 62
    • 82

    Partly Sunny

    • 68
    • 83

    Partly Sunny

Today 3 Sep New Castle

Mostly cloudy with Showers likely with a chance of Thunderstorms this Morning, then partly sunny with a slight chance of Showers and Thunderstorms this afternoon. Locally heavy rainfall possible this morning. Warmer with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 3 Sep New Castle

Mostly cloudy with a chance of Thunderstorms. A chance of Showers this Evening, then Showers likely after midnight. Lows in the lower 70s. West Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Brookside Temperature Statistics

September Temperature

Wilmington, New Castle County Airport (6.2 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    80 °F

  • Highest 1 September, 2026

    91.9 °F

Climate (2021–2026)

Wilmington, New Castle County Airport (6.2 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.7 °F
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