Brookside Weather Forecast

    • 54
    • 63

    Rain Showers Likely

    • 53
    • 67

    Mostly Cloudy

    • 52
    • 66

    Mostly Cloudy

    • 54
    • 67

    Slight Chance Rain Showers

    • 55
    • 69

    Slight Chance Rain Showers

    • 55
    • 69

    Partly Sunny

Today 22 Sep New Castle

Mostly sunny. Highs in the mid 70s.

Tonight 22 Sep New Castle

Cloudy. A chance of Showers, mainly this evening. Lows in the mid 50s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 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 15 September, 2026

    52.6 °F

  • Average September

    74.8 °F

  • Highest 1 September, 2026

    93.7 °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

    57.4 °F

  • Average High 2021–2026

    66.8 °F
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