Downtown Portland hit 90 degrees Thursday, breaking the old record for the day of 85, set in 1998. In Seattle, a high of 85 broke the previous May 1 record of 81, set in both 1998 and 1976.
Weather Service meteorologist Ni Cushmeer in Seattle says other records for the day were set with highs of 87 at Olympia, 80 at Hoquiam on the Washington coast and 78 at Bellingham.
Vancouver, Washington's high of 88 beat the old record of 84.
On the north Oregon coast, Astoria had a record high of 81 while Salem in the Willamette Valley hit a record 88. In southern Oregon, Klamath Falls' high of 83 broke a record of 77 set in 2004.
Forecasters are predicting clouds on Friday with a chance of showers this weekend.