Wilmington Weather Forecast
- 61
- 87
Rain Showers
- 54
- 74
Rain Showers Likely
- 54
- 75
Mostly Sunny
- 58
- 76
Mostly Cloudy
- 57
- 74
Slight Chance Rain Showers
- 59
- 80
Mostly Sunny
Today 6 Sep New Castle
Mostly cloudy with a chance of Showers and Thunderstorms. Some Thunderstorms may be severe. Locally heavy rainfall possible. Hot with Highs in the mid 80s. Temperature falling to around 80 late. West Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.
Tonight 6 Sep New Castle
Showers with a chance of Thunderstorms in the Evening, then Showers likely with a slight chance of Thunderstorms after midnight. Some Thunderstorms may be severe in the evening. Locally heavy rainfall possible in the evening. Humid with Lows in the lower 60s. Northwest Winds 5 to 10 Mph. Chance of rain 80 percent.
Wilmington Temperature Statistics
September Temperature
Wilmington, New Castle County Airport (5.6 miles)
Lowest 1 September, 2025
55 °FAverage September
69.7 °FHighest 4 September, 2025
82.9 °F
Climate (2020–Present)
Wilmington, New Castle County Airport (5.6 miles)
Average Low 2020–2025
48.1 °FAverage 2020–2025
57.3 °FAverage High 2020–2025
66.5 °F