Seattle - Recent December Temperatures, Rain & Snow





The numbers here describe what the December weather in Seattle, Washington was like for every year since 2010. A series of tables gives December data by year for temperature, precipitation and snowfall.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many really hot or cold days occurred each December. Then there's information on how much rain and snow actually landed this month during recent years, as well as how often Seattle had wet or snowy weather.

The climate data come from weather measurements made at Seattle—Tacoma International Airport.

Temperature Weather iconTemperature

December temperature averages by year in Seattle
High °F Low °F Year High °C Low °C
45 35 2017 7 1
42 34 2016 6 1
47 39 2015 8 4
50 40 2014 10 5
45 35 2013 7 2
45 38 2012 7 3
44 34 2011 7 1
48 38 2010 9 4
Number of days in December when the temperature in Seattle dropped to 32 or below, or rose to at least 70 degrees Fahrenheit
32 °F
0 °C
Year 70 °F
21 °C
10 2017 0
11 2016 0
3 2015 0
5 2014 0
11 2013 0
3 2012 0
14 2011 0
2 2010 0

Rainy Weather iconPrecipitation

This table gives the total precipitation that fell on Seattle during December in each year from 2010. The number of days with precipitation counts the days when rainfall or snowfall (when melted) amounted to 0.01 inches (0.254 millimeters) or more.

Total precipitation for December in Seattle
Days Year Inches Milli­metres
15 2017 5.3 135
10 2016 3.9 99
18 2015 11.2 284
14 2014 4.8 122
6 2013 1.7 42
17 2012 6.9 174
4 2011 2.3 57
13 2010 8.7 221

Snowy Weather iconSnow

Amount of snowfall in Seattle for December and number of days when new snow totalled at least 1 inch (2.5 centimetres)
Days Year Inches Centi­metres
2 2017 2.6 7
0 2016 1.0 3
0 2015 0.0 0
0 2014 0.0 0
1 2013 1.1 3
0 2012 0.6 2
0 2011 0.0 0
0 2010 0.5 1
Reference

Jay Lawrimore. 2016. Global Summary of the Month, Version 1.0. NOAA National Centers for Environmental Information. 

Seattle - Recent Years
Seattle - Extremes
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