I'm going to Seattle, Washington for four days what to wear?

Ya it's pretty warm in the summer so just bring your normal summer clothes (shorts, tank tops, etc.) but it can be chilly at times as well so don't forget a warm jacket, and sweat pants and stuff like that. Usually it's sunny most of the time during the summer, but you never know if it's gonna rain (it's been raining a lot lately since the start of the summer and hasn't been that warm, our spring this year was recorded as the 2nd coldest spring in history, on average it was maybe in the 50s and it was in the 40s a lot as well, hopefully our summer isn't gonna suck), anyways hope you have fun, don't mean to scare you with the weather :)