Williamsport Average Temperature by Month

This page shows the average temperature in each month of the year in Williamsport, Pennsylvania. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Williamsport?
In Williamsport, Pennsylvania, the warmest month is July, with an average daily high temperature of 85.1 °F and an average low of 62.7 °F.
What's the Coldest Month in Williamsport?
In Williamsport, Pennsylvania, the coolest month is January, with an average daily high temperature of 35.5 °F and an average low of 20.0 °F.
Month Avg. High Avg. Low
January 35.5 °F 20.0 °F
February 38.9 °F 21.4 °F
March 48.6 °F 29.0 °F
April 61.9 °F 39.0 °F
May 72.7 °F 49.1 °F
June 80.8 °F 58.3 °F
July 85.1 °F 62.7 °F
August 82.9 °F 61.3 °F
September 75.4 °F 54.1 °F
October 63.3 °F 42.7 °F
November 50.8 °F 33.1 °F
December 39.9 °F 25.7 °F
Year 61.4 °F 41.5 °F
Weather Station Details
Years Station Coordinates
1948–2024 Williamsport location
1895–1947 Williamsport location