Weather By Day

September Weather In Portland  
September Portland Weather
Record High: 105°F
Normal High: 69°F
Normal Low: 48°F
Record Low: 34°F
Avg Monthly Rain: 3.37"
Rec 1 Day Rain: 2.23"

Portland Weather In September

The record high September temperature in Portland Maine for the last 70 years was 105 degrees Fahrenheit, registered on September 2, 1988, while the standard high temperature is 69. The record low September temperature in Portland for the last 70 years was 34 measured on September 22, 1961, and the mean daily low in the month is 48.

According to National Weather Service Portland September Weather data, on September 26, 1948, the recorded high temperature did not exceed 52 degrees Fahrenheit, the lowest high measured in Portland in the past 70 years. The Weather Service additionally shows that on September 14, 2000, the low for the day did not drop below 64 degrees, the highest low temperature in Portland in the last 70 years.

National Weather Service data shows that the high temperature in Portland on September First averages 44 degrees Fahrenheit and the high on the final day of September averages 39 degrees. The low recorded temperature in Portland on September First averages 32 degrees Fahrenheit and the low temperature on the final day of September averages 27 degrees.

Portland typically receives an average of 3.37 inches of precipitation during the month. The most precipitation recorded on a single day in September, according to September Portland Weather data, was 2.23 inches on September 17, 1969.