Portland Weather In September

The record high September temperature in Portland Maine for the last 70 years was 96 degrees Fahrenheit, most recently encountered on September 16, 1939, while the standard high temperature is 69. The lowest measured temperature in Portland for the last 70 years in September was 23 most recently measured on September 30, 1941, and the standard low recorded daily temperature is 48.

United States National Weather Service historical Portland September Weather data shows that on September 21, 1977, the high temperature did not exceed 45 degrees Fahrenheit, the lowest high measured in Portland in the past 70 years. Weather Service data also shows that on September 2, 1980, the lowest recorded temperature for the day did not drop below 72 degrees, the highest low measured temperature in Portland in the last 70 years.

NWS data indicates that the daily high temperature in Portland on September First averages 75 degrees Fahrenheit and the high on the last day of September averages 64 degrees. The daily low temperature in Portland on September First averages 54 degrees Fahrenheit and the low on the last day of September averages 43 degrees.

Portland typically receives an average of 3.37 inches of precipitation during the month. The most rain recorded in a single day, as shown by September Portland Weather data, was 7.49 inches on September 11, 1954.