PM Update: Chilly overnight, but more fantastic weather on Sunday
Spring has sprung and, for once, the weather seems to be in step with the season change. High pressure will remain in charge for the duration of the weekend, which means nothing but lots of sunshine and comfortable temperatures. Not too bad for the first weekend of the new season.
Through tonight: Skies will remain clear of clouds, and winds should be nonexistent. It’s also still dry, with dew points only in the teens. All that adds up to an ideal environment for temperatures to drop off tonight. Lows outside the Beltway will easily fall into the 20s. Temperatures inside the Beltway and downtown will settle in the low 30s.
Tomorrow (Sunday): Nearly perfect weather continues. After a chilly start, temperatures will rise into the low 60s under mostly sunny skies. A few fair-weather clouds may work their way into the region by the afternoon, but not enough to disturb another nice day. Clear and cold again in the evening, with lows in the 20s outside the Beltway and in the low 30s inside.
https://www.washingtonpost.com/weather/2021/03/20/pm-update-chilly-overnight-more-fantastic-weather-sunday/?