New Castle, DE Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for New Castle, DE in one place.
A chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 93. West wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for New Castle, DE is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jun 10, 2026 10:41 AM EDT.
The active forecast window currently covers Jun 12 to Jun 16, 2026 for New Castle, DE.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 12 to Jun 16, 2026
- Latest sync
- Jun 10, 2026 10:41 AM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in New Castle
Friday looks like the warmest upcoming period in New Castle at 93 degrees F.
Monday Night is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Friday at about 5 to 10 mph W.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 10, 2026 10:41 AM EDT
- Coverage
- 5 days
- Time zone
- America/New_York
- Forecast office
- PHI
- Radar station
- KDOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Sunny, with a high near 89.
Mostly clear, with a low around 67.
Sunny, with a high near 91.
A chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
A chance of rain showers before 2pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jun 12
|
Mostly Sunny then Chance Showers And Thunderstorms
|
93°F |
5 to 10 mph
W
|
|
Friday Night
Jun 12
|
Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
NW
|
|
Saturday
Jun 13
|
Sunny
|
89°F |
5 to 10 mph
NW
|
|
Saturday Night
Jun 13
|
Mostly Clear
|
67°F |
0 to 5 mph
W
|
|
Sunday
Jun 14
|
Sunny
|
91°F |
0 to 10 mph
SW
|
|
Sunday Night
Jun 14
|
Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
SW
|
|
Monday
Jun 15
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
83°F |
5 to 10 mph
W
|
|
Monday Night
Jun 15
|
Chance Showers And Thunderstorms
|
65°F |
5 mph
SE
|
|
Tuesday
Jun 16
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
82°F |
5 mph
SW
|
|
Tuesday Night
Jun 16
|
Chance Showers And Thunderstorms
|
65°F |
5 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around New Castle.
