Brookside Weather Forecast

    • 57
    • 65

    Rain

    • 60
    • 63

    Rain

    • 59
    • 68

    Mostly Cloudy

    • 59
    • 74

    Partly Sunny

    • 61
    • 77

    Partly Sunny

    • 62
    • 78

    Partly Sunny

Today 26 Sep New Castle

Rain. Highs in the mid 60s. North Winds 15 to 20 Mph with Gusts up to 45 Mph. Chance of rain 80 percent.

Tonight 26 Sep New Castle

Rain. Near steady temperature in the upper 50s. North Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 90 percent.

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Brookside Temperature Statistics

September Temperature

Wilmington, New Castle County Airport (6.2 miles)

  • Lowest 15 September, 2026

    52.6 °F

  • Average September

    73.3 °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

    66.7 °F
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