Weather By Day

January Portland Weather 
January Portland Weather
Record High: 66°F
Normal High: 46°F
Normal Low: 34°F
Record Low: -40°F
Avg Monthly Rain: 5.07"
Rec 1 Day Rain: 2.48"
Avg Monthly Snow: 3.2"
Rec 1 Day Snow: 14.4"

Portland Weather In January

The record high temperature in Portland for the last 70 years in January was 66 degrees Fahrenheit, most recently measured on January 18, 2005, while the average high temperature is 46. The record low January temperature in Portland for the last 70 years was -40 most recently measured on January 15, 1956, while the regular low temperature for a given day during the month is 34.

United States NWS historical Portland January Weather data records that on January 31, 1950, the high temperature did not exceed 16 degrees Fahrenheit, the lowest high measured in Portland in the past 70 years. NWS weather data additionally shows that on January 6, 1957, the lowest recorded temperature on that day did not drop below 136 degrees, the highest low measured in Portland in the last 70 years.

According to the National Weather Service, the high temperature in Portland in January on the first day of the month averages 44 degrees and the high on the last day of the month averages 39 degrees. The average recorded low temperature in Portland on January First is 32 degrees Fahrenheit and the average low on the last day of January is 27 degrees.

Portland usually receives an average of 5.07 inches of precipitation during January. The most precipitation recorded on a single day in January, according to January Portland Weather data, was 2.48 inches on January 6, 1948. Portland receives an average of 3.2 inches of snow in January. The most snow measured in a single day in January was 14.4 inches on January 21, 1943.