Seattle isn't hot compared to Texas. It gets into the 90s at the most, usually at the peak of summer. You won't be able to do much skiing, however. There is usually a little snow on the runs starting in December, but most years the coverage is just starting to get good around/after the holidays.
As for breweries, you can go to Pike at the Market and Big Time brewpub in the U-district. Check out the Coal Creek Porter if you get to Big Time. Georgetown makes one of my favorites, Manny's pale ale. It's named after the neighborhood in which it is located. Then there's Fremont brewing, which is more in Wallingford than in Fremont, despite the name. But Hale's is in Fremont. If you're in the area, check out Brouer's Cafe -- it isn't a brewpub, but they have so many beers on tap you could get lost in there. Good selection of local and international craft brews last time I was there. There's Elysian Brewing up on Capitol Hill and I almost forgot, Pyramid in SODO. That should keep you busy.
Plus there are other brewpubs like the Ram, Gordon-Biersch and the Rock Bottom, but I think you can get that stuff in other cities too.