Wilmington, Delaware – Summer heat ramps up across Delaware as Friday, July 18th, brings soaring temperatures and a strong chance for afternoon thunderstorms. Residents and commuters, especially along I-95 through Wilmington, should brace for a muggy day with heat indexes reaching as high as 102°F and the threat of strong storms after 3 p.m.
According to the National Weather Service, Friday’s high will top out near 94°F. Southwest winds could gust up to 20 mph, amplifying the heat. By mid-afternoon, scattered thunderstorms may develop, producing locally heavy downpours and potentially hazardous travel. Lightning and brief gusty winds could impact outdoor events and late-day commutes. Drivers should use caution on area roadways, avoid flooded streets, and allow extra time for travel—especially during evening rush hour.
Saturday continues the pattern, with scattered morning showers and a better chance for widespread storms late in the day and into Saturday night. Rain may be locally heavy, with up to a 60% chance of showers as the weekend progresses. Sunday will be partly sunny and warm, but afternoon storms remain possible, keeping roads slick and humidity high.
Preparedness tips: Stay hydrated, limit strenuous activity outdoors, and check on vulnerable neighbors and pets. Consider charging electronic devices in case of isolated power outages during storms.
Looking ahead, Monday through Wednesday brings a return to mostly sunny skies, with highs steadily climbing into the mid-to-upper 80s—classic July warmth for the Wilmington area. However, pop-up afternoon storms can’t be ruled out, especially Monday.
Warnings for heat and possible storms remain in effect through the weekend, with further advisories possible. Monitor the latest updates from the National Weather Service.
Delaware Five-Day Forecast: July 18–July 23
- Friday (July 18): Mostly sunny, high near 94°F, storms after 3 p.m., heat index up to 102°F.
- Saturday: Showers possible, storms likely late, high near 88°F.
- Sunday: Chance of storms, partly sunny, high near 86°F.
- Monday: Mostly sunny, high near 85°F, stray storm possible.
- Tuesday: Mostly sunny, high near 85°F.
- Wednesday: Mostly sunny, high near 88°F.
