New Castle Weather Forecast

    • 77
    • 96

    Mostly Sunny

    • 70
    • 89

    Rain Showers

    • 64
    • 74

    Rain Showers Likely

    • 62
    • 79

    Mostly Sunny

    • 63
    • 82

    Mostly Sunny

    • 65
    • 84

    Partly Sunny

Today 30 Jul New Castle

Sunny, hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph.

Tonight 30 Jul New Castle

Mostly clear. Lows in the mid 70s. South Winds around 5 Mph.

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New Castle Temperature Statistics

July Temperature

Wilmington, New Castle County Airport (1.9 miles)

  • Lowest 5 July, 2025

    61.6 °F

  • Average July

    80.2 °F

  • Highest 8 July, 2025

    94.6 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (1.9 miles)

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  • Average Low 2020–2025

    48.2 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    66.5 °F
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