Weather in Williamsport in September
Williamsport temperatures in September range from 12 to 25 and there is an average of 16 days of rain.
Avg Temp
12° - 25°
Avg Rainy Days
16
Avg Dry Days
14
Avg Snow Days
0
Weather Facts - Williamsport in September
* The warmest temperature recorded in in September is 36°C
* The coldest temperature recorded in Williamsport in September is 0°C
* The average rainfall in Williamsport in September is 107 mm