Philadelphia Weather Forecast: Record Heat and Severe Storms on July 25, 2025

Philadelphia Heat Wave: Dangerous Temperatures Build Throughout the Day

The region is facing dangerously high temperatures, with Philadelphia weather forecasts predicting a high of 97°F, which could potentially tie a record set in 2016.

However, the heat index – factoring in high humidity – will make it feel significantly hotter, ranging between 103-107°F.

An Extreme Heat Warning is currently in effect for Philadelphia, while surrounding suburbs are under a Heat Advisory.

Residents are strongly advised to stay hydrated, seek air-conditioned environments, and limit strenuous outdoor activities during peak heat hours.

Severe Thunderstorms Threaten Philadelphia in the Afternoon and Evening

Adding to the challenging conditions, strong to severe thunderstorms are anticipated to develop around 4 PM and continue into the evening.

These storms pose a threat of damaging winds, heavy downpours, and localized flooding.

A Severe Thunderstorm Watch is in effect until 9 p.m. for the broader Philadelphia area, with South Jersey facing the highest probability of experiencing significant storm activity.

While the risk is low, the possibility of brief, isolated tornadoes cannot be ruled out.

Frequent lightning is also a concern during these severe storms.

Philadelphia Weekend Weather Outlook: Persistent Humidity and Storm Potential

While Saturday will offer a slight reprieve from the extreme heat, temperatures will remain muggy with highs near 90°F.

The chance of showers and thunderstorms returns on Sunday, suggesting continued unsettled weather conditions.

Looking ahead, more 90-degree temperatures are forecast for the following week, indicating a prolonged period of hot weather for the region.

Philadelphia Weather Safety: Staying Informed and Safe

Residents are strongly encouraged to stay updated on the latest Philadelphia weather information through reliable local news sources.

You can find detailed updates from NBC10 and FOX 29 Philadelphia.

Downloading their respective apps, NBC10 and FOX LOCAL, will provide direct access to live updates and alerts from the First Alert Weather and FOX 29 Weather teams.

Staying informed is crucial for ensuring personal weather safety during these potentially hazardous conditions.

In summary, Philadelphia is set for a challenging July 25, 2025 weather forecast with both a significant heat wave and the threat of severe thunderstorms.

By staying informed through local news and taking recommended precautions, residents can navigate these extreme conditions safely.