New Castle, DE Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for New Castle, DE in one place.
Sunny, with a high near 75. Northwest wind 0 to 5 mph.
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: May 30, 2026 6:34 PM EDT.
The active forecast window currently covers May 31 to Jun 5, 2026 for New Castle, DE.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 31 to Jun 5, 2026
- Latest sync
- May 30, 2026 6:34 PM 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 87 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Wednesday at about 5 to 10 mph NE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- May 30, 2026 6:34 PM EDT
- Coverage
- 6 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
Mostly clear, with a low around 57. Southwest wind around 5 mph.
Mostly sunny, with a high near 77. North wind 0 to 5 mph.
Partly cloudy, with a low around 55.
A chance of rain showers after 8am. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
A chance of rain showers before 8pm. Partly cloudy, with a low around 54. Chance of precipitation is 30%.
Sunny, with a high near 75.
A slight chance of rain showers after 8pm. Partly cloudy, with a low around 56.
A slight chance of rain showers before 8am. Sunny, with a high near 80.
Mostly clear, with a low around 61.
Sunny, with a high near 87.
Partly cloudy, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
May 31
|
Sunny
|
75°F |
0 to 5 mph
NW
|
|
Sunday Night
May 31
|
Mostly Clear
|
57°F |
5 mph
SW
|
|
Monday
Jun 1
|
Mostly Sunny
|
77°F |
0 to 5 mph
N
|
|
Monday Night
Jun 1
|
Partly Cloudy
|
55°F |
5 mph
E
|
|
Tuesday
Jun 2
|
Chance Rain Showers
|
73°F |
5 mph
NE
|
|
Tuesday Night
Jun 2
|
Chance Rain Showers then Partly Cloudy
|
54°F |
0 to 5 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
75°F |
5 to 10 mph
NE
|
|
Wednesday Night
Jun 3
|
Slight Chance Rain Showers
|
56°F |
5 mph
NE
|
|
Thursday
Jun 4
|
Slight Chance Rain Showers then Sunny
|
80°F |
5 to 10 mph
N
|
|
Thursday Night
Jun 4
|
Mostly Clear
|
61°F |
5 to 10 mph
SW
|
|
Friday
Jun 5
|
Sunny
|
87°F |
5 to 10 mph
W
|
|
Friday Night
Jun 5
|
Partly Cloudy
|
66°F |
5 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around New Castle.
