Increased chances of storms and foggy conditions expected in Thursday's weather forecast for Philadelphia.
Weather Forecast for the Philadelphia Area and Surrounding Regions
As we move through the week, residents of Pennsylvania, New Jersey, and Delaware can expect a mix of sunny and partly cloudy weather, with temperatures in the 80s. Here's a breakdown of the forecast:
- On Tuesday, the weather will be mostly sunny with high temperatures of 81 degrees and lows at 67 degrees.
- On Wednesday, the weather will be partly cloudy with high temperatures of 82 degrees and lows at 68 degrees.
- On Thursday, the weather will be foggy, with low visibility in the Brandywine Valley. Storms are expected to move out by 8 p.m., leaving a mostly clear night.
- On Friday, the weather will be sunny with a chance of a late afternoon shower. High temperatures will reach 89 degrees, and lows will be at 74 degrees.
- On Saturday, the weather will be mostly sunny for the Eagles' preseason game versus the Cleveland Browns at Lincoln Financial Field. High temperatures will be 88 degrees, and lows will be at 71 degrees.
- On Sunday, the weather will be mostly sunny with high temperatures of 91 degrees and lows at 71 degrees.
Tropical Storm Erin Update
As of August 24, 2025, Tropical Storm Erin has already transitioned to a post-tropical cyclone, having been the first hurricane of the 2025 Atlantic season that reached Category 5 intensity at peak. Although it moved northeast off the U.S. East Coast without making landfall, it caused tropical storm conditions, dangerous surf, and rip currents, especially along North Carolina's Outer Banks and Bermuda, prompting evacuations and state emergency declarations.
Erin originated as a Cape Verde hurricane developing from a tropical wave near Cape Verde on August 11. Its precursor caused deadly flooding in Cape Verde with multiple fatalities, and it generated dangerous conditions along the U.S. East Coast, including life-threatening surf and rip currents.
The storm's rapid intensification was fueled by unusually warm sea surface temperatures linked to human-driven climate warming, which suggests the coming season could also see similarly intense storms supported by warm Atlantic waters. Erin’s record-breaking rapid intensification underscores how climate change acts to boost hurricane intensity.
As for the potential impact of Erin on the remainder of the 2025 hurricane season, it is still early in the season, and Erin being the first major hurricane indicates a climatologically active pattern. Monitoring continues for future storms influenced by similar oceanic and atmospheric conditions that fueled Erin's development.
Weather Conditions and Humidity
Humidity will remain in the "muggy" to "gross" range through the weekend, making for sticky conditions.
For the latest weather updates and forecasts for Pennsylvania, New Jersey, and Delaware, be sure to check the Weather Radars and Weather Blogs sections of the website. Stay tuned for more updates on Tropical Storm Erin and the 2025 hurricane season.
