The Flats Weather Forecast

    • 58
    • 75

    Gradual Clearing

    • 61
    • 78

    Mostly Cloudy

    • 65
    • 81

    Partly Sunny

    • 63
    • 83

    Slight Chance Rain Showers

    • 59
    • 71

    Chance Rain Showers

    • 55
    • 69

    Chance Rain Showers

Today 29 Sep New Castle

Mostly cloudy this Morning, then becoming partly sunny. Highs in the mid 70s. Northwest Winds around 5 Mph.

Tonight 29 Sep New Castle

Partly cloudy in the Evening, then clearing. Lows in the upper 50s. Northwest Winds around 5 Mph in the Evening, becoming light and variable.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

The Flats Temperature Statistics

September Temperature

Wilmington, New Castle County Airport (5.6 miles)

  • Lowest 24 September, 2026

    49.6 °F

  • Average September

    71.9 °F

  • Highest 1 September, 2026

    93.7 °F

Climate (2021–2026)

Wilmington, New Castle County Airport (5.6 miles)

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

  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    66.7 °F
Get WillyWeather+ to remove ads