They say the weather will be good, but as of now I have my doubts. The fog has been in every morning and it is cold! So if you like that type of weather it will be perfect. If not, wait until around noon or 2pm and the sun should be in evidence. Then again, the weather in Berkeley is always a crap shoot so don't rely on my forecast or that of the pros.
Whatever the clime, it should be loads of fun!
Please drop by and say hello. I'll be stationed across from Provo Park, (aka: MLK-Civic Center Park), on Center St, above MLK Jr.Way.