"The coldest winter I ever spent was a summer in San Francisco." ~Mark Twain
San Francisco’s climate is, if nothing else, dependably changeable. Temperatures and conditions change literally by the hour and can differ markedly from one part of the city to the other. In August, days usually start and end in fog with a few sunny hours in between. To prepare for your visit, make sure to bring along a few warm items. You will need these in the mornings and evenings.