The Space Needle is a must-see if you haven't already. There are also surrounding museums and various activities to do in the area!
Visit Seattle's famous Pike Place Market, home of the very first Starbucks. Grab some clam chowder or a lobster roll, browse the various shops, and stop by the gum wall!
If you are more of the outdoors type, and don't mind going for a bit of a drive, we recommend visiting the Snoqualmie Falls. They should be beautiful in November (but it may also be raining!) You can also visit the nearby Salish Lodge, where they filmed the 80s show Twin Peaks. We both love the show, and also had a romantic getaway here in 2020.
The Seattle Aquarium is fun to visit!
The Woodland Park zoo is a fun time for animal lovers. It may be rainy in November, though!
Visit the luscious Bellevue Botanical Gardens. When we lived on the East Side, we frequently visited. It is free for all visitors, and they have a variety of different plants year-round. Again, it may be rainy!