average temperature San francisco May
In most years, San Francisco averages a daily maximum temperature for May that's between 62 and 67 degrees Fahrenheit (17 to 19 degrees Celsius). The minimum temperature usually falls between 49 and 53 Â°F (10 to 12 Â°C).The days at San Francisco warm a little during May.sually every day during May the temperature rises to over 50 Â°F (10 Â°C) in San Francisco. The city averages 5 days this month when the thermometer reaches into the 70s Â°F (over 21 Â°C). Temperatures above 90 Â°F (32 Â°C) rarely happen during May. The thermometer dips to 60 F (16 C) or below every night this month.