March is a great time to visit San Francisco as the weather is mild and the days begin to warm up, inching towards Spring. Be prepared for some rainy days, but expect an average low of 49°F and an average high of 62°F throughout the month.  The crowds are still smaller than in summer, and it's also an excellent time to visit before the city's famous summer fog sets in. Some events may be postponed or different this year due to COVID-19, we will do our best to update this page with any new information.