Delaware River - Port Penn Weather Forecast

    • 54
    • 69

    Rain Showers

    • 52
    • 80

    Rain Showers Likely

    • 45
    • 64

    Rain Showers Likely

    • 49
    • 65

    Partly Sunny

    • 53
    • 69

    Rain Showers

    • 51
    • 69

    Rain Showers Likely

    • 53
    • 71

    Chance Rain Showers

Today 9 May New Castle

Mostly cloudy. A chance of Showers this Morning, then Showers likely with a chance of Thunderstorms this afternoon. Highs in the upper 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 9 May New Castle

Partly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Evening, then mostly cloudy after midnight. Patchy fog after midnight. Lows in the lower 50s. South Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Delaware River - Port Penn Temperature Statistics

May Temperature

Wilmington, New Castle County Airport (10.6 miles)

  • Lowest 1 May, 2026

    42.7 °F

  • Average May

    60.4 °F

  • Highest 5 May, 2026

    84.7 °F

Climate (2021–Present)

Wilmington, New Castle County Airport (10.6 miles)

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

  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.2 °F

  • Average High 2021–2026

    66.6 °F
Get WillyWeather+ to remove ads