Weather By Day

January Williamsport Weather 
January Williamsport Weather
Record High: 69°F
Normal High: 33°F
Normal Low: 18°F
Record Low: -20°F
Avg Monthly Rain: 2.85"
Rec 1 Day Rain: 2.62"
Avg Monthly Snow: 11.1"
Rec 1 Day Snow: 19.6"

Williamsport Weather In January

The hottest day in Williamsport Pennsylvania in January for the past 66 years was 69 degrees Fahrenheit, most recently registered on January 25, 1967, while the regular high temperature is 33. The lowest documented temperature for Williamsport for the past 66 years in January was -20 most recently measured on January 10, 1994, while the average low temperature is 18.

US National Weather Service historical Williamsport January Weather data records that on January 11, 1982, the high temperature did not exceed 0 degrees Fahrenheit, the lowest high measured in Williamsport in the past 66 years. Weather Service records additionally indicate that on January 7, 1998, the low for the day was not measured below 58 degrees, the highest low temperature recorded in Williamsport in the last 66 years.

NWS data indicates that the daily high temperature in Williamsport on January First averages 37 degrees Fahrenheit and the high on the last day of January averages 34 degrees. The low temperature in Williamsport in January on the first day of the month averages 21 degrees and the low temperature on the last day of the month averages 17 degrees.

Williamsport usually receives an average of 2.85 inches of rain during January. According to January Williamsport Weather records, the most rain measured in a single day in January was 2.62 inches on January 27, 1996. Williamsport receives an average of 11.1 inches of snow in January. The highest snowfall measured in a single day in January was 19.6 inches on January 13, 1964.