Weather By Day

December Weather In Williamsport  
December Williamsport Weather
Record High: 70°F
Normal High: 38°F
Normal Low: 24°F
Record Low: -15°F
Avg Monthly Rain: 2.94"
Rec 1 Day Rain: 3.29"
Avg Monthly Snow: 8.4"
Rec 1 Day Snow: 14.7"

Williamsport Weather In December

The highest recorded temperature in December for Williamsport Pennsylvania for the past 66 years was 70 degrees Fahrenheit, most recently encountered on December 1, 2006, while the standard high temperature is 38. In the last 66 years the highest reported temperature in Williamsport for December was -15 most recently measured on December 27, 1950, and the average low daily temperature is 24.

According to National Weather Service historical Williamsport December Weather data, on December 2, 1983, the high temperature did not exceed 7 degrees Fahrenheit, the lowest high measured in Williamsport in the past 66 years. The Weather Service additionally shows that on December 5, 1951, the low for the day did not drop below 54 degrees, the highest low temperature in Williamsport in the last 66 years.

NWS data indicates that the daily high temperature in Williamsport on December First averages 42 degrees Fahrenheit and the high on the last day of December averages 36 degrees. The average daily low temperature in Williamsport on December First is 27 degrees Fahrenheit and the average low on the last day of December is 20 degrees.

Williamsport normally receives an average of 2.94 inches of rain during December. According to December Williamsport Weather records, the most rain measured in a single day in December was 3.29 inches on December 13, 1983. Williamsport averages 8.4 inches of snow in December. The most snow measured in a single day in December was 14.7 inches on December 26, 1969.