Weather By Day

December Portland Weather 
December Portland Weather
Record High: 65°F
Normal High: 45°F
Normal Low: 35°F
Record Low: 6°F
Avg Monthly Rain: 5.71"
Rec 1 Day Rain: 2.16"
Avg Monthly Snow: 1.4"
Rec 1 Day Snow: 8"

Portland Weather In December

The record high December temperature in Portland Oregon for the last 70 years was 65 degrees Fahrenheit, on December 10, 1993, while the regular high temperature is 45. The coldest day reported in Portland in December for the past 70 years was 6 most recently registered on December 16, 1964, while the average low temperature is 35.

United States National Weather Service historical Portland December Weather data shows that on December 24, 1949, the high temperature did not exceed 48 degrees Fahrenheit, the lowest high measured in Portland in the past 70 years. Weather Service records additionally show that on December 25, 1980, the recorded low temperature for the day did not drop below 60 degrees, the highest low measured in Portland in the last 70 years.

NWS data indicates that the daily high temperature in Portland on December First averages 44 degrees Fahrenheit and the high on the last day of December averages 39 degrees. The average daily low temperature in Portland on December First is 32 degrees Fahrenheit and the average low on the last day of December is 27 degrees.

Portland usually receives an average of 5.71 inches of rain during the month. According to December Portland Weather records, the most rain measured in a single day in December was 2.16 inches on December 27, 1942. Portland averages 1.4 inches of snow in December. The most snow measured in a single day in December was 8 inches on December 19, 1964.