Boston, NYC, Portland Welcome Heat Wave Relief

By , Senior Meteorologist
July 21, 2013; 11:00 AM ET
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Play video Weather across the Northeast is detailed in the above AccuWeather.com video.

While the mid-Atlantic remains humid, more comfortable air has graced much of the Northeast this Sunday.

Gone Sunday is the 90-degree heat and high humidity that has been soaring northward to Portland and Bangor, Maine, recently.

In its place, high pressure will usher in cooler and less humid air following locally severe thunderstorms on Saturday.

The nicest conditions on Sunday will grace upstate New York and New England, where humidity will be at its lowest and temperatures will be held to the 70s and 80s.

RELATED:
New York City's Electric Usage Sets All-Time Record
Northeast Regional Radar
Forecast Temperature Maps

Partly to mostly sunny skies and dry weather will compliment the day in both Portland and Boston. AccuWeather.com RealFeel® temperatures will be held to the lower 80s in both of these cities, a stark contrast to the recent triple-digit RealFeel temperatures.

Last week's heat wave stretched on for seven days in Boston and ranks as the city's third longest. The nine-day heat wave from July 1912 holds the record for Boston's lengthiest.

For both Boston and New York City, Sunday will mark the first day that temperatures will fail to reach 90 degrees since Saturday, July 13.

A shower or thunderstorm will rattle New York City for a time Sunday, but humidity will be noticeably lower and temperatures will be more seasonable than what was recorded during the seven-day heat wave.

Not since August 2002, has New York City endured a more lengthy heat wave. As residents and visitors dealt with the oppressive heat, the city set an all-time electric usage record on Friday.

Farther to the south on Sunday, the air will still feel humid and sticky to those in Philadelphia, Baltimore and Washington, D.C. The good news is that more typical late-July highs for these cities are expected, not a repeat of the recent extreme heat.

City
Hottest High Last Week
Sunday's High
Normal High
Portland
95
78
79
Boston
99
82
82
New York City
98
88
84
Philadelphia
98
89
87
Baltimore
97
89
87
Washington, D.C.
97
92
89

The steamy air will set the stage for a shower or thunderstorm to develop and briefly interfere with outdoor plans.

Showers and thunderstorms will return to more of the Northeast Monday and Tuesday as humidity surges back to the north--but not accompanied by searing heat.

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