Temperatures are forecast to make a run at 90 F Tuesday, ahead of a push of cooler air from the Atlantic Ocean.
Higher humidity will once again create uncomfortable sticky conditions.
The steamy weather will also set the stage for a couple of thunderstorms to develop Tuesday afternoon, mainly north of the nation's capital.
If temperatures hit 90 on Tuesday, it will be the first such temperature reading of the season and the warmest day since Oct. 6.
In the wake of Tuesday's storminess, how far south the front sinks will determine whether a noticeably cooler and cloudy Wednesday unfolds versus another warm day.
As a front approaches from the Midwest Thursday night and Friday, it may join forces with tropical moisture moving northward.
According to Senior Meteorologist Alex Sosnowski, "If the two fully get together and the forward speed of the front slows, there is the potential for incidents of flash and urban flooding."
In the wake of the front this weekend, cooler and more seasonable air will settle in, but there is the chance of showers and thunderstorms, mainly during the afternoon and evening hours.
While waters will be slow to recede across flood-ravaged South Carolina, dry weather will return and help cleanup efforts.
There can even be the odd thundery shower in parts of England and Wales.
South Carolina Gov. Nikki Haley confirmed nine weather-related fatalities amid historic flooding across the state.
In lieu of direct impact from Hurricane Joaquin, what led to historic rainfall in the Carolinas this past weekend?
The U.S. Coast Guard has abandoned the search for a missing container ship but continues to search for any signs of life after the El Faro is presumed to have sunk.
An upper-level area of low pressure will slowly track eastward across the Southwest and produce rounds of showers and thunderstorms into Wednesday.