Temperatures only reached the 60s on Monday, but it appears it will be an extremely short-lived cool spell.
Temperatures Monday reached 69°F at Reagan National Airport. This is the coolest the high temperature has been since May 25th earlier this year when it hit 68°F for the high. This isn't extremely cold, but is unseasonably cool with the average high now at 77°F.
Oddly enough, the last time low temperatures were in the 40s at Reagan National also occurred on May 25th, and there is an outside chance it could happen tomorrow morning, but at this time we think it will be closer to 50°F-53°F at Reagan National tomorrow morning.
This week actually features a very quiet weather pattern with one area of low pressure south of D.C. during the Wednesday-Thursday time period possibly bringing a few clouds, but no precipitation is expected through this weekend.
Even with the heavy rain this weekend that totaled around an inch in some areas, Reagan National is still down 1.5" for the month of September and 3" over the past two months as far as average precipitation is concerned.