This swampy air mass is making it hard to cool down at night. On Tuesday, record high minimum temperatures were tied or established at all three local Washington/Baltimore airports. See the above graphic.
We’ll probably set/tie more records today unless it cools off before midnight (getting some rain would help!). Lows so far: DCA 78 (record 76, 1983), IAD 74 (record 73, 1999) , BWI 77 (record 77, 1999).