New Castle Weather Forecast

    • 62
    • 69

    Chance Rain Showers

    • 64
    • 70

    Rain Showers Likely

    • 69
    • 77

    Rain Showers Likely

    • 74
    • 87

    Chance Rain Showers

    • 70
    • 90

    Chance Rain Showers

    • 67
    • 85

    Mostly Sunny

Today 15 Jun New Castle

Cloudy. Patchy fog this morning. A slight chance of Showers this Morning, then a chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the upper 60s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 15 Jun New Castle

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Lows in the lower 60s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

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New Castle Temperature Statistics

June Temperature

Wilmington, New Castle County Airport (1.9 miles)

  • Lowest 2 June, 2025

    49.6 °F

  • Average June

    72.2 °F

  • Highest 12 June, 2025

    90 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (1.9 miles)

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  • Average Low 2020–2025

    48.1 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    66.5 °F
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