The cities of Seattle, Olympia, Wash., and Portland, Ore., all broke monthly rainfall records, Accuweather.com reported.
On Saturday, 1.71 inches of rain fell in Seattle, breaking the city's daily record of 1.65 inches.
The wet conditions were caused by the former Typhoon Pabuk combining with a storm in the Gulf of Alaska.
Winds in Washington state and Oregon left tens of thousands of people without power last weekend.
A tornado hit Puyallup, Wash., Monday. The tornado's winds were as strong as 110 mph, and caused damage to rail cars and a number of buildings, including a Boeing plant, The Seattle Times reported.
No one was injured.