Weather By Day

September Allentown Weather 
September Allentown Weather
Record High: 99°F
Normal High: 74°F
Normal Low: 53°F
Record Low: 31°F
Avg Monthly Rain: 4.37"
Rec 1 Day Rain: 6.37"

Allentown Weather In September

The record high temperature in Allentown for the last 67 years in September was 99 degrees Fahrenheit, on September 1, 1980, while the regular high temperature is 74. The lowest documented temperature for Allentown for the past 67 years in September was 31 measured on September 24, 1963, and the standard low recorded daily temperature is 53.

US National Weather Service historical Allentown September Weather data records that on September 28, 1984, the high temperature did not exceed 50 degrees Fahrenheit, the lowest high measured in Allentown in the past 67 years. Weather Service records also indicate that on September 17, 1991, the low temperature for the day was not measured below 75 degrees, the highest low measured in Allentown in the last 67 years.

National Weather Service data shows that the high temperature in Allentown on September First averages 80 degrees Fahrenheit and the high on the final day of September averages 68 degrees. The average recorded low temperature in Allentown on September First is 59 degrees Fahrenheit and the average low on the last day of September is 48 degrees.

Allentown typically receives an average of 4.37 inches of rain during the month. September Allentown Weather records indicate that on September 30, 1999 Allentown received 6.37 inches of precipitation, the highest amount of rain recorded in a single day in September.