 To WTOP meteorologist Mike Steneford. Hot and humid as we go into the evening hours. Scattered thunderstorms rolling in ahead of a front. Some of these storms could be severe. Layers night showers and storms will end as the front comes through. Overnight clearing, turning cooler and less muggy. Lows in the 60s. Lots of sunshine, breezy cooler and less muggy on Monday with a high around 80. Mike Steneford, WTOP News. 91 degrees in Upper Marlborough, 92 in Woodbridge, 93 in Washington at 330.