Philadelphia Weather In September
In the last 69 years the highest measured September temperature in Philadelphia was 100 degrees Fahrenheit, measured on September 29, 1953, and the normal high is 77. The lowest documented temperature for Philadelphia for the past 69 years in September was 35 most recently measured on September 26, 1963, and the standard low recorded daily temperature is 61.
US National Weather Service Philadelphia September Weather data records that on September 28, 1984, the high temperature did not exceed 52 degrees Fahrenheit, the lowest high measured in Philadelphia in the past 69 years. NWS weather data additionally shows that on September 3, 1993, the lowest recorded temperature on that day did not drop below 77 degrees, the highest low measured in Philadelphia in the last 69 years.
According to the National Weather Service, the high temperature in Philadelphia in September on the first day of the month averages 83 degrees and the high on the last day of the month averages 71 degrees. The daily low temperature in Philadelphia on September First averages 65 degrees Fahrenheit and the low on the last day of September averages 53 degrees.
Philadelphia usually receives an average of 3.88 inches of rain during September. The most rain recorded in a single day, as shown by September Philadelphia Weather data, was 6.63 inches on September 16, 1999.