Thursday’s rainy evening on the National Mall. ( Angela Pan via Flickr )

More than three inches of rain doused parts of the D.C. region Thursday evening, putting an end to a week-long, record-setting heat wave.

D.C. hit at least 95 degrees on seven straight days and did not fall below 80 degrees for 134 hours.

And then it was over.

The rain came in multiple rounds, generally unloading about 0.75 to 2 inches. The Washington Post weather station downtown logged 1.17 inches of rain, while the White House rain gauge reported 1.44 inches.

But as is often the case in summer storms, amounts varied significantly around the region.


Doppler-estimated rainfall totals on Thursday. (National Weather Service)

Link: Rainfall totals compiled by National Weather Service

The heaviest amounts focused north of downtown Washington. Areas in western Montgomery County and northern Anne Arundel County received as much as three to four inches. Totals reported to the Community Collaborative Rain, Hail and Snow Network ran as high as 3.66 and 3.63 inches in Potomac and Rockville, Md. A flash-flood warning was issued for much of Montgomery County and the northern part of the District, where high water remained in spots Friday morning.

Amounts decreased substantially south of the District. Reagan National Airport posted just 0.27 inches.

The rain followed one of the hottest stretches on record in the District.


Temperatures in D.C. (as measured at Reagan National Airport) hit at least 95 degrees on seven straight days, tied for the fifth-longest streak on record. It was D.C.’s hottest stretch since the summer of 2012 when it was 95 degrees or hotter on a record 11 straight days.

The temperature didn’t drop below 80 degrees for 134 straight hours in Washington, from 7 a.m. Saturday to 9 p.m. Thursday, the second-longest period on record (just four hours short of the longest period, in July 2013).

During this week-long heat wave, D.C. set one record high temperature (on Monday) and three records for warmest low temperature (Monday, Tuesday and Wednesday).

For the next several days, at least, the heat eases, with highs in the mid-to-upper 80s, which is close to average.