 Sunny and pleasant with low humidity on Tuesday, but a bit warmer. Highs low to mid-80s. Lots of sunshine turning warmer and more muggy by Wednesday. Highs will be in the upper 80s. Fourth of July on Thursday, partly cloudy, hot and muggy. Watch out for some late-day thunderstorms and highs in the low to mid-90s. Mike Stenefer, WTOP News. Some spotty thunderstorms still showing up on the radar across Charles and northern St. Mary's County. It is 83 degrees in Friendship Heights.