Weather By Day

September Weather In Williamsport  
September Williamsport Weather
Record High: 102°F
Normal High: 73°F
Normal Low: 53°F
Record Low: 30°F
Avg Monthly Rain: 3.98"
Rec 1 Day Rain: 6.29"

Williamsport Weather In September

The highest recorded temperature in September for Williamsport for the past 66 years was 102 degrees Fahrenheit, on September 1, 1953, while the mean high temperature is 73. In the last 66 years the highest reported temperature in Williamsport for September was 30 registered on September 25, 1963, and the average low daily temperature is 53.

According to National Weather Service Williamsport September Weather data, on September 27, 1984, the recorded high temperature did not exceed 48 degrees Fahrenheit, the lowest high measured in Williamsport in the past 66 years. Weather Service data also shows that on September 1, 1977, the lowest recorded temperature for the day did not drop below 73 degrees, the highest low measured temperature in Williamsport in the last 66 years.

National Weather Service records indicate that the high temperature in Williamsport on September First averages 79 degrees and the high on the last day of the month averages 68 degrees. The low measured temperature in Williamsport on September First averages 58 degrees and the low on the last day of the month averages 47 degrees.

Williamsport usually receives an average of 3.98 inches of rain during September. September Williamsport Weather records indicate that on September 16, 1999 Williamsport received 6.29 inches of precipitation, the highest amount of rain recorded in a single day in September.