New Castle Airport Weather Forecast

    • 61
    • 85

    Increasing Clouds

    • 60
    • 79

    Chance Rain Showers

    • 64
    • 79

    Rain Showers Likely

    • 59
    • 74

    Chance Rain Showers

    • 54
    • 64

    Chance Rain Showers

    • 55
    • 63

    Chance Rain Showers

Today 18 Sep New Castle

Mostly sunny. Humid with Highs in the mid 80s. North Winds 5 to 10 Mph.

Tonight 18 Sep New Castle

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 60s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

New Castle Airport Temperature Statistics

September Temperature

Wilmington, New Castle County Airport (0 miles)

  • Lowest 15 September, 2026

    52 °F

  • Average September

    75.4 °F

  • Highest 1 September, 2026

    93.7 °F

Climate (2021–2026)

Wilmington, New Castle County Airport (0 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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