You're probably going to be too hot in that. Canada Goose jackets are designed for like -50C and below. Try a wool coat or something. You're probably even okay with a leather jacket. I'd be surprised if it was less than about 15C.
Just check the weather, personally I don't think wearing a Canada goose is going to be comfortable as in might get too warm. I only wear mine when its 3 degrees or under.. but then again I live in Canada.
Well, they're having a lot of rainstorms right now (relating to El Niño, apparently) so a rain coat would do pretty well. You should also bring a lighter, yet still water proof jacket just in case. On a side note: a lot of people in So Cal (I'm in North Cal) are really nervous about the storms, but in reality it's just rain (and at worst hail) + Cali is in a huge drought, so whatever.