The low temperature Tuesday at BWI-Marshall Airport was 68 degrees. That broke the record-high minimum temperature for the date - 66 degrees - set in 1990, according to the National Weather Service.
Similar records were broken at Wednesday at Washington's Reagan National Airport and Dulles International Airport in Virginia. The instruments in Washington on the 27th showed a low of 66 degrees, breaking the 65-degree record set in 1908 and matched in 1990 and 1994.
Out at Dulles, the low temperature was 68 degrees, breaking the 63-degree record set on the same date in 2009.
The mild overnight temperatures were the result of a deep low-pressure system over eastern Canada that had dragged a warm front north of the region in advance of the low's trailing cold front, which finally passed through the region Thursday afternoon.