Philadelphia, Pennsylvania – A scorching heat wave will grip Philadelphia Friday, July 25, with heat index values reaching a blistering 105°F before thunderstorms roll in.
According to the National Weather Service, an Extreme Heat Watch remains in effect from Friday morning through Friday evening, impacting residents across southeastern Pennsylvania, including Philadelphia, Bucks, and Montgomery counties. Temperatures will soar to 97°F Friday afternoon, with oppressive humidity pushing the heat index over 100°F.
Health officials urge residents to avoid extended outdoor exposure, stay hydrated, and check on vulnerable neighbors. Never leave children or pets in vehicles — interiors can become deadly within minutes.
By late Friday, scattered thunderstorms could develop between 8 p.m. and 2 a.m., potentially disrupting evening plans and travel. Brief downpours and isolated gusty winds are possible, although rainfall totals should remain light.
Storm chances persist into Saturday and Sunday, especially during the afternoon and evening hours. Highs will stay in the low 90s through the weekend, with more humidity and a continued risk of lightning delays and flooding on local roads like I-95 and Roosevelt Boulevard.
📆 Five-Day Philadelphia Forecast (July 25–30)
- Friday: High 97°F, heat index 105°F, chance of PM thunderstorms
- Saturday: High 91°F, 30% chance of afternoon/evening storms
- Sunday: High 88°F, 50% chance of PM storms, muggy
- Monday: Mostly clear, high 89°F
- Tuesday: Sunny, hot again with highs near 94°F
⚠️ Stay weather-aware through the weekend — Friday’s heat and storm combo is the most dangerous of the week.
