Philadelphia, Pennsylvania – Temperatures will climb into the upper 80s by Thursday afternoon, bringing a summerlike stretch of heat across Pennsylvania and New York City just 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 and Northeast 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. Along the I-95 corridor from Washington’s northern suburbs through New York City, dry air and increasing sunshine will accelerate vegetation drying, raising wildfire risk in wooded and suburban areas.
New York City, including Manhattan, Brooklyn, and Queens, will see highs in the mid to upper 80s, while inland areas such as Allentown and Scranton may briefly approach 88 to 90°F. Farther north into the Hudson Valley, temperatures will trend slightly cooler in the low to mid-80s but remain well above normal.
The precipitation outlook shows a transition during this period, with near-normal to slightly below-normal rainfall early 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 parts of New York State.
Residents should avoid outdoor burning, stay hydrated, and secure loose outdoor items as winds increase late in the period. Drivers along I-76, I-78, and I-95 should be alert for changing conditions as storms approach.
The most consistent heat is expected through April 19, followed by increasing storm chances into early next week. Additional advisories are likely as the pattern shifts from dry heat to a more active weather setup.
