San Francisco's climate has often been described as mild with temperatures rarely rising above 70 degrees or falling below 40 degrees. It is difficult to dress for San Francisco weather because the day can start off nice and mild and before you know it, the fog will roll in at any time thereby turning a beautiful day into a foggy cool one.
The advise to San Francisco visitors is to dress in layers to accommodate both warm and cold weather.
Always take jackets with you to San Francisco
