Philadelphia Weather In May
The highest recorded temperature in May for Philadelphia Pennsylvania for the past 69 years was 97 degrees Fahrenheit, on May 13, 1991, and the average high is 72. The lowest reported temperature in May for Philadelphia for the past 69 years was 28 most recently measured on May 11, 1966, and the standard low recorded daily temperature is 55.
According to National Weather Service Philadelphia May Weather data, on May 15, 1978, the recorded high temperature did not exceed 47 degrees Fahrenheit, the lowest high measured in Philadelphia in the past 69 years. Weather Service data also shows that on May 14, 1991, the lowest recorded temperature for the day did not drop below 76 degrees, the highest low measured temperature in Philadelphia in the last 69 years.
NWS data indicates that the daily high temperature in Philadelphia on May First averages 70 degrees Fahrenheit and the high on the last day of May averages 79 degrees. The low recorded temperature in Philadelphia on May First averages 49 degrees Fahrenheit and the low temperature on the final day of May averages 59 degrees.
Philadelphia usually receives an average of 3.89 inches of precipitation during May. May Philadelphia Weather records indicated that on May 24, 1999 Philadelphia received 2.49 inches of precipitation, the most rain recorded in a single day in May.