Warmth will build across the northeastern United States in the wake of beneficial rain and thunderstorms through Monday.
"Summertime warmth will again return to parts of the Northeast on Tuesday, especially along the I-95 corridor," said AccuWeather Meteorologist Jake Sojda.
"Temperatures will reach 10 to even 15 degrees above normal in spots," he added.
Prior to the warmup on Tuesday, occasional bursts of rain and thunderstorms will inhibit temperatures from spiking in the Northeast into Monday night.
The rain may temporarily ease the abnormally dry to extreme drought conditions from Pennsylvania and New Jersey to New York and New England.
"Enough rain will fall to soak the ground and allow some lawns to green up and start to grow again," according to AccuWeather Senior Meteorologist Alex Sosnowski.
As the rain departs on Tuesday, the door will be opened for sunshine and warmth to return to the region.
Highs will range from the lower 80s in Boston to the upper 80s F in Washington, D.C. Highs in the upper 70s to middle 80s will be common across interior areas of the Northeast.
Temperatures this high are more typical of July.
During the second half of September, average daytime temperatures generally range from the upper 60s to the middle 70s across the region. Average highs also fall about one degree every two to three days during the month.
Dry weather is expected to accompany the warmth for a majority of the region, which is good news for any planned outdoor activities.
Only very spotty showers and thunderstorms may dampen a portion of upstate New York and New England as a weak front moves through on Tuesday.
Clouds and light showers may also linger along the immediate mid-Atlantic and southern New England coasts, which could hold back temperatures a bit.
While the warmth is expected to throttle back at midweek, especially across the interior, most areas will stay 5 to 10 degrees Fahrenheit above normal for the remainder of the week, Sojda explained.
Warm surges in September are not entirely unusual as summer and fall battle for the upper hand.
Weather systems in Asia are helping to amplify this week's warmth, Sosnowski stated.
The above-average warmth may be slashed in the Northeast during the upcoming weekend and early next week.