New Castle Weather Forecast

    • 39
    • 59

    Partly Sunny

    • 39
    • 53

    Mostly Cloudy

    • 45
    • 57

    Mostly Cloudy

    • 60
    • 70

    Chance Rain Showers

    • 50
    • 71

    Rain Showers

    • 38
    • 57

    Slight Chance Rain Showers

Today 12 Mar New Castle

Sunny, cooler. Near steady temperature in the upper 50s. East Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 12 Mar New Castle

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the upper 30s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

New Castle Temperature Statistics

March Temperature

Wilmington, New Castle County Airport (1.9 miles)

  • Lowest 2 March, 2025

    19.9 °F

  • Average March

    43.4 °F

  • Highest 1 March, 2025

    67.6 °F

Climate (2020–Present)

Wilmington, New Castle County Airport (1.9 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    66.2 °F
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