Philadelphia, PA – The first half of August has felt more like early fall for much of the Mid-Atlantic, as persistent onshore winds have kept daytime highs muted and nights cool. According to the National Weather Service in Mount Holly, coastal areas are experiencing their coolest first two weeks of August in about 30 to 35 years.
At Atlantic City Airport and Georgetown, Delaware, temperatures are running nearly 5 degrees below average for the month so far. Atlantic City Marina didn’t even reach 80°F until Tuesday, which is an unusually late milestone for mid-August.
Inland areas like Allentown and Philadelphia have also seen cooler-than-usual temperatures, with average readings 2–3 degrees below normal. Mount Pocono, for example, has averaged just 66.5°F, while coastal spots like Atlantic City have been in the low 70s. For some areas, the last time such a cool stretch occurred so early in August was in the 1980s and ’90s.
The cooler pattern has led to reduced air conditioning demand, but beachgoers have had to contend with brisk mornings and evenings chilly enough for sweaters. The National Weather Service notes that this cool trend may shift next week, with warmer air pushing into the region.
