50-60 degrees would likely be the days high. Mornings and evenings (~10pm) may well be down close to freezing.

Here is a url that gives the SF forecast for the next week. Hopefully it will give a good idea how to pack just before you need to pack.

http://stoat.uwyo.edu/cgi-bin/zone-id?ID=KSFO

Excepting for storms, the weather won't change much between now and then.

Glenn
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Glenn