New Castle County, DE Weather Forecast
County weather hub
Chance Rain Showers
Compare major city weather across New Castle County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers. Partly sunny, with a high near 66. East wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for New Castle County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in New Castle County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 4:15 PM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in New Castle County
Friday looks like the warmest upcoming period in New Castle County at 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph N.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 4:15 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 58. Southeast wind around 5 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. South wind 5 to 15 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 48. 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.
Patchy frost after 8pm. Mostly clear, with a low around 38.
Patchy frost before 10am. Sunny, with a high near 57.
Mostly clear, with a low around 41.
Mostly sunny, with a high near 63.
A slight chance of rain showers between 8pm and 2am. Partly cloudy, with a low around 45.
Partly sunny, with a high near 66.
Partly cloudy, with a low around 46.
Sunny, with a high near 66.
Mostly clear, with a low around 46.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Chance Rain Showers
|
66°F |
5 mph
E
|
|
Tonight
Oct 15
|
Rain Showers Likely
|
58°F |
5 mph
SE
|
|
Friday
Oct 16
|
Chance Rain Showers then Partly Sunny
|
80°F |
5 to 15 mph
S
|
|
Friday Night
Oct 16
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms
|
48°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
|
Patchy Frost
|
38°F |
5 to 15 mph
N
|
|
Sunday
Oct 18
|
Patchy Frost then Sunny
|
57°F |
5 mph
NE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
41°F |
0 to 5 mph
NE
|
|
Monday
Oct 19
|
Mostly Sunny
|
63°F |
5 mph
NE
|
|
Monday Night
Oct 19
|
Slight Chance Rain Showers
|
45°F |
0 mph
|
|
Tuesday
Oct 20
|
Partly Sunny
|
66°F |
0 to 5 mph
N
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
46°F |
0 to 5 mph
N
|
|
Wednesday
Oct 21
|
Sunny
|
66°F |
5 mph
NE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
46°F |
0 to 5 mph
NE
|
Major City Forecasts
Live forecast snapshots for major cities across New Castle County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in New Castle County.
Largest mapped city population in this region: 70,376.
