New Castle County, DE Weather Forecast

County weather hub

75°
F

Sunny

Compare major city weather across New Castle County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Sunday, May 31, 2026
Wind: 0 to 5 mph NW
Sunday

Sunny, with a high near 75. Northwest wind 0 to 5 mph.

County weather hub

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
May 31 to Jun 5, 2026
Latest sync
May 30, 2026 6:46 PM EDT
Forecast office
PHI
Source
NOAA / NWS
Next High
75°F
Sunday
Next Low
55°F
Sunday Night
Rain Outlook
4
Periods mentioning precipitation
Windiest
5 to 10 mph
Wednesday

Daily Outlook

Today
May 31
Sunny
75 °F
/ 55°F
Wind 0 to 5 mph
Mon
Jun 1
Mostly Sunny
78 °F
/ 53°F
Wind 0 to 5 mph
Tue
Jun 2
Slight Chance Rain Showers
74 °F
/ 52°F
Wind 5 mph
Wed
Jun 3
Sunny
75 °F
/ 54°F
Wind 5 to 10 mph
Thu
Jun 4
Slight Chance Rain Showers then Sunny
80 °F
/ 60°F
Wind 5 mph
Fri
Jun 5
Sunny
87 °F
/ 66°F
Wind 5 to 10 mph

This Week in New Castle County

Friday looks like the warmest upcoming period in New Castle County at 87 degrees F.

Tuesday Night is the coolest period ahead with temperatures near 52 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 6:46 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 source

Extended Forecast

Sunday Night
May 31
55°F
Mostly Clear
5 mph SW

Mostly clear, with a low around 55. Southwest wind around 5 mph.

Monday
Jun 1
78°F
Mostly Sunny
0 to 5 mph N

Mostly sunny, with a high near 78. North wind 0 to 5 mph.

Monday Night
Jun 1
53°F
Partly Cloudy
5 mph E

Partly cloudy, with a low around 53.

Tuesday
Jun 2
74°F
Slight Chance Rain Showers
5 mph NE

A slight chance of rain showers after 8am. Mostly sunny, with a high near 74.

Tuesday Night
Jun 2
52°F
Slight Chance Rain Showers then Partly Cloudy
0 to 5 mph E

A slight chance of rain showers before 8pm. Partly cloudy, with a low around 52.

Wednesday
Jun 3
75°F
Sunny
5 to 10 mph NE

Sunny, with a high near 75.

Wednesday Night
Jun 3
54°F
Slight Chance Rain Showers
0 to 5 mph NE

A slight chance of rain showers after 8pm. Partly cloudy, with a low around 54.

Thursday
Jun 4
80°F
Slight Chance Rain Showers then Sunny
5 mph N

A slight chance of rain showers before 8am. Sunny, with a high near 80.

Thursday Night
Jun 4
60°F
Mostly Clear
5 mph SW

Mostly clear, with a low around 60.

Friday
Jun 5
87°F
Sunny
5 to 10 mph W

Sunny, with a high near 87.

Friday Night
Jun 5
66°F
Partly Cloudy
5 mph W

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
55°F
5 mph
SW
Monday
Jun 1
Mostly Sunny
78°F
0 to 5 mph
N
Monday Night
Jun 1
Partly Cloudy
53°F
5 mph
E
Tuesday
Jun 2
Slight Chance Rain Showers
74°F
5 mph
NE
Tuesday Night
Jun 2
Slight Chance Rain Showers then Partly Cloudy
52°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
54°F
0 to 5 mph
NE
Thursday
Jun 4
Slight Chance Rain Showers then Sunny
80°F
5 mph
N
Thursday Night
Jun 4
Mostly Clear
60°F
5 mph
SW
Friday
Jun 5
Sunny
87°F
5 to 10 mph
W
Friday Night
Jun 5
Partly Cloudy
66°F
5 mph
W

Coverage

Tracked cities
4
Coverage
100%

Forecast coverage currently spans 4 of 4 mapped cities in New Castle County.

Largest mapped city population in this region: 70,376.

Habs new castle county court house
Habs new castle county court house image
Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.