New Castle Weather Forecast
- 77
- 96
Mostly Sunny
- 70
- 89
Rain Showers
- 64
- 74
Rain Showers Likely
- 62
- 79
Mostly Sunny
- 63
- 82
Mostly Sunny
- 65
- 84
Partly Sunny
Today 30 Jul New Castle
Sunny, hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph.
Tonight 30 Jul New Castle
Mostly clear. Lows in the mid 70s. South Winds around 5 Mph.
New Castle Temperature Statistics
July Temperature
Wilmington, New Castle County Airport (1.9 miles)
Lowest 5 July, 2025
61.6 °FAverage July
80.2 °FHighest 8 July, 2025
94.6 °F
Climate (2020–Present)
Wilmington, New Castle County Airport (1.9 miles)
Average Low 2020–2025
48.2 °FAverage 2020–2025
57.3 °FAverage High 2020–2025
66.5 °F