Weather By Day

December Seattle Weather 
December Seattle Weather
Record High: 62°F
Normal High: 46°F
Normal Low: 36°F
Record Low: 10°F
Avg Monthly Rain: 5.62"
Rec 1 Day Rain: 1.75"
Avg Monthly Snow: 2.4"
Rec 1 Day Snow: 10"

Seattle Weather In December

The record high December temperature in Seattle Washington for the last 66 years was 62 degrees Fahrenheit, on December 12, 1952, while the average high temperature is 46. The lowest documented temperature in December for Seattle for the past 66 years was 10 most recently measured on December 30, 1968, and the typical low is 36.

According to National Weather Service Seattle December Weather data, on December 21, 1968, the recorded high temperature did not exceed 19 degrees Fahrenheit, the lowest high measured in Seattle in the past 66 years. Weather Service records also indicate that on December 23, 1950, the low temperature for the day was not measured below 54 degrees, the highest low measured in Seattle in the last 66 years.

National Weather Service data shows that the high temperature in Seattle on December First averages 49 degrees Fahrenheit and the high on the final day of December averages 46 degrees. The low recorded temperature in Seattle on December First averages 42 degrees Fahrenheit and the low temperature on the final day of December averages 38 degrees.

Seattle typically receives an average of 5.62 inches of precipitation during the month. The most precipitation measured in a single day, as indicated by December Seattle Weather data, was 1.75 inches on December 28, 1965. Seattle receives an average of 2.4 inches of snow in December. The most snow recorded in a single day in December was 10 inches on December 31, 1968.