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Fox News Weather Center

Northeast Settles Into Pattern With Warm Days, Chilly Nights This Week

Warm and dry weather will stick around through the rest of the week across the Northeast promoting several days of great outdoor weather conditions.

A ridge in the jet stream and sprawling high pressure will help pump in warmer air over the next several days and will keep rain away and skies generally cloud-free.

"Many thought that the autumnlike chill over the weekend meant summer was over," AccuWeather Meteorologist Elliot Abrams said. "However, that is not the case."

Summer's Last Tango in the Northeast

Daily highs will return to the 80s F for many locations across the Northeast with only a few locations in the Appalachians remaining in the upper 70s F.

The autumnlike chill Abrams referenced was a blast of the chilliest air since last spring for many areas of the East this past weekend. The storm system that ushered in the cooler air also delivered a shield of clouds and rain that made it feel even cooler.

Where skies cleared, overnight low temperatures plummeted into the 20s and allowed frost to develop in some areas in the Great Lakes region.

Cities such as Pittsburgh, Syracuse, New York, Washington, D.C., Boston, Montreal and Ottawa will feel high temperatures 5 to 10 degrees above normal. Parts of Canada, including Montreal, will have a shot at setting new high temperature records during this upcoming stretch of warm weather.

While daytime temperatures will warm and make it feel like summer, there will be one thing lacking to make it a true summer air mass.

"The system over the weekend helped bring an abundance of dry air, so while temperatures will be above normal, humidity levels will generally remain low," Abrams said.

The lack of humidity will be seen as a positive for some, especially for those wanting to partake in outdoor activities.

"It will be a great week to walk, cycle, run, picnic and enjoy any outdoor concerts and ball games," Abrams said.

However, the lack of humidity will worsen droughtlike conditions in some parts.

Despite the days getting warmer, nighttime temperatures will remain chillier, especially in the suburbs and countryside.

Cloud-free nighttime skies will allow most of the daytime warmth to escape, leading to chilly nights.

Those who had to dig out jackets and sweatshirts this past weekend will want to keep those nearby as lows are expected to drop into the 50s and even 40s each night this week.

Low temperatures in Philadelphia, New York City, Boston and other places along I-95 will drop into the 60s at night.

"Fog will increase in coverage in valley locations through the week," Abrams said.

Motorists will want to use extra caution when driving in the morning as some fog will be rather dense in some spots, reducing visibility to below a half-mile.

The above-average warmth will continue into the weekend, but a cold front will help to drop temperatures for the new week.

According to AccuWeather Meteorologist Ben Noll, the warmth will be quick to rebound for the second half of September, with the most notable warmth dominating across the Plains and Midwest.

Summertime warmth will become less frequent as the calendar heads towards autumn. Normal temperatures are falling at an increasingly faster rate, about a degree every couple of days.

Astronomical autumn officially begins Sept. 23, at 4:21 a.m. EDT.