Showers and thunderstorms will be nearly daily visitors in the Appalachians, and along the Gulf Coast and Atlantic Seaboard. This includes cities from Miami to Atlanta, Washington, D.C., New York City and Boston.
While it will rain less than a quarter of the time any given day, some locations can be hit by multiple downpours on multiple days.
The bulk of the rainfall will occur but will not limited to the afternoon and evening hours, when the greatest chance for a locally strong thunderstorm is also likely.
Thunderstorms in part of the Ohio Valley can be strong to locally severe at midweek.
Fans heading to ball games in New York, Philadelphia, Baltimore and Pittsburgh this week should have the rain gear handy.
In the coastal areas of the Northeast, a partial flow of moist air from the Atlantic will work to keep daytime temperatures on the cool side of normal for June.
High humidity will make it hard for those who exercise or work outdoors to keep cool and dry. Evaporation rates will be low and RealFeel® temperatures will be elevated because of the high humidity.
Because of the high humidity and cloud cover, nights most nights may be warmer than average, if not a bit muggy.
This flow of moisture can also lead to flight delays due to low clouds and fog on occasion.
Sunshine may be limited to a few hours or less on a daily basis for those trying to catch some rays at the beach.
A brief push of dry air may have enough punch to shave humidity levels in New England by Wednesday.
There is some good news for people in the Northeast who have plans this coming weekend. Early indications are that a push of dry air will advance across the region allowing some sunshine and a drop in humidity for Saturday and Sunday.
Since this forecast push of dry air will be week and aimed more eastward, it is unlikely there will be any significant change in humidity levels for much of the South. This may also translate to an ongoing risk of daily showers and thunderstorms.
By Alex Sosnowski, Expert Senior Meteorologist for AccuWeather.com