Wilmington, Delaware Weather:
Active Weather Warnings
Friday, June 12, 2026
Sunny with a Chance of Thunderstorms
Day 93°
Night 68°
Precipitation 55 %
Wind 9 mph
UV Index (0 - 11+) 11

Weather Alerts and Warnings for

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 11 at 2:51AM EDT until June 12 at 8:00PM EDT by NWS Mount Holly NJ
Jun 11, 11:00 AM Jun 12, 8:00 PM
WHAT: Heat index values up to 104 degrees expected.

WHERE: In Delaware, New Castle County. In New Jersey, Mercer,
Camden, Gloucester, and Northwestern Burlington Counties. In
Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower
Bucks, and Philadelphia Counties.

WHEN: From 11 AM this morning to 8 PM EDT Friday.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

ADDITIONAL DETAILS: Some showers and thunderstorms late this
afternoon and again late Friday afternoon will provide some local
relief from the heat, however it will still remain very humid. It
will then turn much less humid this weekend in the wake of a cold
front.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. If you do not have air conditioning in your home or lack shelter, you can call 211, or visit your county or state health department website for assistance locating appropriate shelter from the heat.
Updated: Jun 11, 12:20 PM Source: NWS Alert