Warmth and humidity will build over the mid-Atlantic and much of New England this weekend just in time for the official summer season. Summer officially begins at 1:04 a.m. EDT Friday, June 21.
A warm afternoon will follow Friday. Typical summertime warmth combined with humidity will follow in most areas by Saturday. For some areas, this will become the second heat wave since late May.
Daytime highs will range from the middle 80s to near 90 degrees along the I-95 corridor from Washington, D.C., to Philadelphia, New York City, Hartford and Boston and well into the 80s in the Appalachians to Pittsburgh and Buffalo both days this weekend and on into Wednesday of next week.