New Castle, DE Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for New Castle, DE in one place.
A chance of rain showers. Partly sunny, with a high near 66. East wind around 5 mph. Chance of precipitation is 30%. 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: Oct 15, 2026 4:03 PM EDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for New Castle, DE.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 4:03 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 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph N.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 4:03 PM EDT
- Coverage
- 7 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
Rain showers likely. Cloudy, with a low around 59. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 8am. Partly sunny, with a high near 80. Southwest wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Mostly cloudy, with a low around 51. West wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers likely before 8am. Partly sunny, with a high near 55. North wind 15 to 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 41.
Sunny, with a high near 57.
Mostly clear, with a low around 44.
Mostly sunny, with a high near 63.
A slight chance of rain showers between 8pm and 2am. Partly cloudy, with a low around 49.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 51.
A slight chance of rain showers after 8am. Mostly sunny, with a high near 66.
A slight chance of rain showers before 8pm. Mostly clear, with a low around 50.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Chance Rain Showers
|
66°F |
5 mph
E
|
|
Tonight
Oct 15
|
Rain Showers Likely
|
59°F |
5 to 10 mph
SE
|
|
Friday
Oct 16
|
Chance Rain Showers then Partly Sunny
|
80°F |
10 mph
SW
|
|
Friday Night
Oct 16
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms
|
51°F |
10 to 15 mph
W
|
|
Saturday
Oct 17
|
Rain Showers Likely then Partly Sunny
|
55°F |
15 to 20 mph
N
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
41°F |
5 to 15 mph
N
|
|
Sunday
Oct 18
|
Sunny
|
57°F |
5 mph
NE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
44°F |
5 mph
NE
|
|
Monday
Oct 19
|
Mostly Sunny
|
63°F |
5 mph
NE
|
|
Monday Night
Oct 19
|
Slight Chance Rain Showers
|
49°F |
5 mph
NE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
66°F |
5 mph
N
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
51°F |
5 mph
N
|
|
Wednesday
Oct 21
|
Slight Chance Rain Showers
|
66°F |
5 mph
NE
|
|
Wednesday Night
Oct 21
|
Slight Chance Rain Showers then Mostly Clear
|
50°F |
5 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around New Castle.
