Here in California, not too far from Los Angeles. It can be 75 - 80 during the day or it could be in the 60's. We have had 90's before but that is unusual. Nights will be in the 60's down to 50's. Rain is possible. So are fire storms. Don't need heavy coats or sweaters for here but you will other places.
Went to a wedding in SF last year in late October and it was gorgeous!!!!! Depending on where in SF, there can be winds coming off the bay or the ocean. I would say maybe 60's to 70's.