New Castle Weather Forecast

    • 55
    • 80

    Slight Chance Rain Showers

    • 52
    • 71

    Mostly Sunny

    • 48
    • 68

    Mostly Sunny

    • 52
    • 69

    Mostly Sunny

    • 57
    • 74

    Partly Sunny

    • 59
    • 74

    Mostly Cloudy

    • 59
    • 71

    Mostly Cloudy

Today 28 Sep New Castle

Showers and Thunderstorms likely. Some Thunderstorms may produce gusty Winds and small hail. Near steady temperature in the upper 70s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

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New Castle Temperature Statistics

September Temperature

Wilmington, New Castle County Airport (1.9 miles)

  • Lowest 25 September, 2021

    51.1 °F
  • Average September

    71 °F
  • Highest 15 September, 2021

    88 °F

Climate (2010–Present)

Wilmington, New Castle County Airport (1.9 miles)

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  • Average Low 2010–Present

    49 °F
  • Average 2010–Present

    57.2 °F
  • Average High 2010–Present

    65.8 °F
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