As an upper-level low finally departs from the northeastern US midweek, that will make room for a ridge of high pressure — albeit weak — to creep up the East Coast late-week, allowing for above average temperatures and higher humidity. Some cities in the I-95 corridor, especially from the New York City to Washington, DC areas may even experience a heat wave, which is when temperatures are of at least 90 degrees for 3 consecutive days.
Wednesday will be a much drier day across the region with sunshine more present opposed to the clouds and showers. The only exception will be across parts of New England and Upstate New York where a few passing showers and storms will still be possible. Nonetheless, temperatures will be upwards of 2 to 10 degrees above average region-wide, translating to highs in the low to mid 80s inland to the upper 80s and low 90s closer to the coast, or in the urban areas.
An approaching storm system from the Midwest may then allow for a few showers and thunderstorms to move into interior sections of the Northeast on Thursday, which will keep temperatures closer to average but still into the low to mid 80s for highs. Meanwhile at the coast, it will be sizzling with sunshine, moderate humidity (dew points will mainly be in the mid to upper 60s), and high temperatures around the 90 degree mark. A couple locations, such as Bridgeport, CT and Islip, NY may even break their daily record high temperature.
Thursday will likely be the hottest day of the week but Friday won’t feel too different with temperatures cooling off by just a degree or two. Highs will remain in the upper 80s to low to perhaps mid 90s across most of the I-95 corridor while storms near the coast, allowing for cooler temperatures into the low 80s inland.
A cold front will then give way to seasonably warm conditions for the weekend along with drier, more pleasant air.