This is only true if you're right up on the Peninsula. The South Bay area where YC is located is gorgeous for a huge fraction of the year, and the East bay is at least far less cold than downtown SF.

Even the Peninsula (e.g. San Mateo or Redwood City) is significantly better weather wise compared to SF.

To each their own. SoCal is too hot for many people. Your comment might seem to imply that SF weather is silcon valley weather. 30 minutes south the weather is consistently warmer though leave the coast a little ways and the tempature can also dip more at night.

My family is from Victoria/Vancoucer and likes it cooler to enjoy active outdoor activities like running, biking and hiking. For this SF and Oakland weather is wonderful.

I also work a few blocks from the ferry building and wear shorts near year round, though that isn't saying much spending all my time in a temperature controlled office.

I laugh at your cold weather and point to Chicago

5 months out of the year the average high in Chicago is above 70, SF only in September. I'll take 4 months of cold to 12 months of never warm