New Castle Weather Forecast

    • 60
    • 77

    Increasing Clouds

    • 67
    • 83

    Chance Rain Showers

    • 68
    • 91

    Chance Thunderstorms

    • 63
    • 79

    Chance Rain Showers

    • 62
    • 81

    Mostly Sunny

    • 64
    • 82

    Chance Rain Showers

Today 16 Jun New Castle

Sunny. Highs in the upper 70s. Northwest Winds around 5 Mph, becoming southwest in the afternoon.

Tonight 16 Jun New Castle

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the upper 50s. South Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

New Castle Temperature Statistics

June Temperature

Wilmington, New Castle County Airport (1.9 miles)

  • Lowest 2 June, 2026

    47.6 °F

  • Average June

    74.3 °F

  • Highest 12 June, 2026

    97.6 °F

Climate (2021–Present)

Wilmington, New Castle County Airport (1.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.6 °F
Get WillyWeather+ to remove ads