Philadelphia, Pennsylvania – Temperatures will climb into the upper 80s by Thursday afternoon, bringing a summerlike stretch of heat across Pennsylvania and New Jersey ahead of a late-period shift toward storms.
According to the National Weather Service and NOAA’s Climate Prediction Center, this region is in a 70 to 80 percent probability zone for above-normal temperatures from April 16 through April 20. A broad heat dome over the Mid-Atlantic will suppress rainfall early, allowing temperatures to steadily rise through the end of the workweek.
In Philadelphia and across Bucks, Montgomery, and Delaware counties, highs are expected to reach 85 to 88°F between 2 p.m. and 6 p.m., with overnight lows holding in the mid to upper 60s. Across the river in New Jersey, including Camden, Cherry Hill, and Trenton, similar conditions will develop with dry air and strong sunshine accelerating vegetation drying.
Along the I-95 corridor from Wilmington through Newark and into New York City, dry conditions and increasing southwest winds will elevate wildfire risk in wooded and suburban areas. Inland cities like Allentown and Reading may briefly approach 88 to 90°F, while coastal areas including Atlantic City will remain slightly cooler in the low to mid-80s.
The precipitation outlook shows near-normal to slightly below-normal rainfall early in the period, shifting to a 40 to 50 percent chance of above-normal precipitation between April 18 and April 22. A corridor of heavier rainfall may develop from Pennsylvania into New Jersey, especially west of the Garden State Parkway.
Residents should avoid outdoor burning, stay hydrated, and limit activity during peak afternoon heat. Drivers along I-76, I-78, and the New Jersey Turnpike should remain alert for increasing winds and changing conditions late in the period.
The most consistent heat is expected through April 19, followed by increasing storm chances into early next week. Additional advisories are likely as this pattern shifts from dry heat to a more active weather setup.
