San Francisco Weather In May
In the last 83 years the highest measured May temperature in San Francisco was 97 degrees Fahrenheit, most recently encountered on May 27, 1984, and the mean high is 67. In the last 83 years the lowest measured May temperature in San Francisco was 39 registered on May 3, 1950, and the regular low is 50.
According to National Weather Service San Francisco May Weather data, on May 8, 1963, the recorded high temperature did not exceed 52 degrees Fahrenheit, the lowest high measured in San Francisco in the past 83 years. NWS data also shows that on May 17, 1997, the lowest measured temperature on that day did not drop below 66 degrees, the highest low temperature measured in San Francisco in the last 83 years.
Weather Service historical data shows that the average daily high temperature in San Francisco on May First is 67 degrees Fahrenheit and the average high on the last day of May is 64 degrees. The low recorded temperature in San Francisco on May First averages 50 degrees Fahrenheit and the low temperature on the final day of May averages 48 degrees.
San Francisco usually receives an average of 0.38 inches of precipitation during May. May San Francisco Weather records indicate that on May 20, 1957 San Francisco received 1.53 inches of precipitation, the highest amount of rain recorded in a single day in May.