National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Wilmington Airport (KILG)

Lat: 39.67°NLon: 75.61°WElev: 72ft.

Partly Cloudy

76°F

24°C

Humidity 67%
Wind Speed SE 13 mph
Barometer 29.78 in (1008.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Jun 7:51 pm EDT
Extended Forecast for

New Castle DE

Coastal Flood Advisory June 18, 12:00am until June 18, 04:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Tonight

    Tonight: Mostly cloudy, with a low around 69. South wind around 10 mph.

    Low: 69 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers before noon, then a chance of showers and thunderstorms after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 92. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 68. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly cloudy through mid morning, then gradual clearing, with a high near 83. West wind 5 to 10 mph.

    High: 83 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 63. West wind around 10 mph.

    Low: 63 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 69. South wind around 10 mph.
Thursday
A slight chance of showers before noon, then a chance of showers and thunderstorms after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 92. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 68. West wind 10 to 15 mph, with gusts as high as 25 mph.
Juneteenth
Mostly cloudy through mid morning, then gradual clearing, with a high near 83. West wind 5 to 10 mph.
Friday Night
Clear, with a low around 63. West wind around 10 mph.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 83.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Monday
Showers, mainly after 8am. High near 82. Chance of precipitation is 80%.
Monday Night
Showers. Low around 65. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
New Castle DE
 39.67°N 75.56°W (Elev. 3 ft)
Last Update:
4:08 pm EDT Jun 17, 2026
Forecast Valid:
8pm EDT Jun 17, 2026-6pm EDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation