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City of New Castle, DENew Castle, DE 14 Day Weather - 19720 WeatherWorld.com
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New Castle, DE Weather Forecast
New Castle, DE Weather Forecast Dated: 909 AM Wed Sep 09 2026
Expect a mild stretch with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.
Wednesday, September 9, 2026
Mid-Morning
73°F 23°C
Overcast
Mid-Afternoon
87°F 30°C
Sunny
Early-Evening
80°F 27°C
Sunny
Warm and summery near 87°F 30°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds out of the SW at 13 mph 20 km/h. Gusts up to 26 mph 42 km/h.
Thursday, September 10, 2026
Mid-Morning
74°F 23°C
Light Showers
Mid-Afternoon
73°F 23°C
Scattered Showers
Early-Evening
73°F 23°C
Overcast
Comfortable with temperatures reaching 73°F 23°C, scattered downpours possible, with increasing humidity and steady pressure. Winds blowing from the W at 7 mph 11 km/h.
Friday, September 11, 2026
Mid-Morning
68°F 20°C
Overcast
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
75°F 23°C
Cloudy
Quite warm around 80°F 27°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
68°F 20°C
Partly Cloudy
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
72°F 22°C
Overcast
Warm temperatures up to 81°F 27°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the ENE to the SSE at 7 mph 11 km/h.
Sunday, September 13, 2026
Mid-Morning
65°F 19°C
Light Showers
Mid-Afternoon
79°F 26°C
Light Showers
Early-Evening
75°F 24°C
Light Showers
Mild with a high of 79°F 26°C, persistent showers off and on through the day, with steady humidity and steady pressure. A stray shower or storm late in the day. Winds swinging from the ENE to the E at 2 mph 4 km/h.
Monday, September 14, 2026
Mid-Morning
74°F 24°C
Sunny
Mid-Afternoon
86°F 30°C
Scattered Showers
Early-Evening
80°F 27°C
Scattered Showers
Very warm near 86°F 30°C, though humidity makes it feel like 91°F 33°C, locally heavy downpours at times, with lower humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
75°F 24°C
Scattered Showers
Mid-Afternoon
80°F 27°C
Light Showers
Early-Evening
75°F 24°C
Scattered Showers
Warm and summery around 80°F 27°C (feels like 86°F 30°C), periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Thunderstorms possible in the afternoon and evening.
Wednesday, September 16, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
69°F 21°C
Sunny
Enjoyable around 76°F 25°C, sunny throughout the day, with lower humidity and barometric pressure rising. Winds shifting from the W to the NNW at 12 mph 19 km/h. Gusts up to 27 mph 43 km/h.
Thursday, September 17, 2026
Mid-Morning
60°F 16°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
70°F 21°C
Overcast
Mild temperatures up to 74°F 23°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds turning from the NNW to the SW at 5 mph 9 km/h.
Friday, September 18, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
83°F 28°C
Partly Cloudy
Early-Evening
78°F 26°C
Overcast
Very warm with a high of 83°F 28°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling. Winds switching from the SW to the WSW at 7 mph 11 km/h.
Saturday, September 19, 2026
Mid-Morning
68°F 20°C
Scattered Showers
Mid-Afternoon
62°F 17°C
Overcast
Early-Evening
62°F 17°C
Overcast
Comfortable at 62°F 17°C, scattered downpours possible, with lower humidity and steady pressure. Winds moving from the NNE to the ENE at 5 mph 8 km/h.
Sunday, September 20, 2026
Mid-Morning
58°F 15°C
Overcast
Mid-Afternoon
56°F 13°C
Scattered Showers
Early-Evening
56°F 14°C
Overcast
Crisp with a high near 56°F 13°C, locally heavy downpours at times, with increasing humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
75°F 24°C
Overcast
Early-Evening
74°F 23°C
Light Fog
Enjoyable around 75°F 24°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds swinging from the SSE to the S at 9 mph 14 km/h. Gusts up to 21 mph 34 km/h.
Tuesday, September 22, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
81°F 27°C
Cloudy
Early-Evening
73°F 23°C
Sunny
Warm temperatures up to 81°F 27°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds shifting from the WNW to the SW at 8 mph 12 km/h.
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