SJ as in San Jose?
I don't know the weather conditions there right now. I grew up in San Francisco - about 40 miles north of San Jose - and I used to think it got cold there in the winter until I moved to Chicago. During the day there it's usually in the 40s on cold days and 50s or low 60s on mild days. I'm pretty sure San Jose is similar. More than likely there's someone here who can tell you more accurately than I can, though.
Either way, don't let this trip go by without a visit to San Francisco.
