Live Weather & Forecast
Weather in New Castle
Delaware, United States · Real-time conditions & 3-day outlook
14°C
Feels like 12°C
57°F / Feels 54°F
Sunny
New Castle, Delaware
🌞 Daytime
Updated: 2026-04-13 08:00
Humidity
77%
Wind
19.4 km/h SSW
Wind Gust
28 km/h
Pressure
1021 mb
Visibility
16 km
UV Index
0.5
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
13.6°C
Wind Degree
208°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
177.9 μg/m³
NO₂
4.7 μg/m³
O₃
110 μg/m³
SO₂
5.2 μg/m³
PM 2.5
5.8 μg/m³
PM 10
5.9 μg/m³
Today's Hourly Forecast
24-hour breakdown for New Castle, Delaware
12 AM
11°
Clear
1 AM
11°
Overcast
2 AM
11°
Partly Cloudy
3 AM
11°
Partly Cloudy
4 AM
12°
Clear
5 AM
12°
Clear
6 AM
12°
Clear
7 AM
14°
Sunny
8 AM
14°
Sunny
9 AM
18°
Sunny
10 AM
22°
Sunny
11 AM
25°
Sunny
12 PM
27°
Sunny
1 PM
29°
Sunny
2 PM
29°
Sunny
3 PM
29°
Patchy rain nearby
4 PM
28°
Sunny
5 PM
28°
Sunny
6 PM
25°
Sunny
7 PM
23°
Sunny
8 PM
20°
Cloudy
9 PM
19°
Clear
10 PM
19°
Clear
11 PM
18°
Partly Cloudy
3-Day Forecast
Daily overview for New Castle, Delaware
Today
Sunny
31°
/
10°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:28 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
28°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 18.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.9
🌅 Sunrise: 06:26 AM
🌇 Sunset: 07:40 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
33°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 67%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:25 AM
🌇 Sunset: 07:41 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit New Castle
Plan your trip to New Castle, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in New Castle?
Current conditions in New Castle: Sunny, temperature 14°C, humidity 77%.
What is the best time to visit New Castle?
The best time to visit New Castle is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in New Castle?
New Castle is located at approximately 39.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in New Castle?
The wettest period in New Castle is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to New Castle?
For visits to New Castle during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is New Castle in?
New Castle is located in United States, in the state of Delaware.
What are the public holidays in New Castle in 2026?
View the 2026 public holidays for New Castle on our Holidays page.
What are the GPS coordinates used for the weather forecast in New Castle?
The weather forecast for New Castle uses coordinates 39.6621, -75.5663.