Portland - Recent December Temperatures, Rain & Snow





The numbers here describe what the December weather in Portland, Oregon 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 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 Portland had wet or snowy weather.

The climate data come from weather measurements made at the Weather Forecast Office near downtown Portland.

Temperature Weather iconTemperature

December temperature averages by year in Portland
High °F Low °F Year High °C Low °C
47 38 2018 8 3
44 35 2017 7 2
41 32 2016 5 0
47 38 2015 8 3
48 39 2014 9 4
41 31 2013 5 0
46 38 2012 8 3
44 33 2011 7 0
46 38 2010 8 3
Number of days in December when the temperature in Portland dropped to 0 or 32 or below, or rose to at least 70 degrees Fahrenheit
0 °F
-18 °C
32 °F
0 °C
Year 70 °F
21 °C
0 3 2018 0
0 10 2017 0
0 19 2016 0
0 7 2015 0
0 4 2014 0
0 16 2013 0
0 2 2012 0
0 19 2011 0
0 3 2010 0

Rainy Weather iconPrecipitation

This table gives the total precipitation that fell on Portland 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 (0.3 millimeters) or more.

Total precipitation for December in Portland
Days Year Inches Milli­metres
20 2018 6.2 158
14 2017 3.6 91
20 2016 5.5 139
28 2015 16.6 421
21 2014 6.6 167
12 2013 2.1 52
25 2012 8.1 206
12 2011 3.1 79
24 2010 9.9 250

Snowy Weather iconSnow

Amount of snowfall in Portland for December and number of days when new snow totalled at least 1 inch (2.5 centimetres)
Days Year Inches Centi­metres
0 2018 0.0 0
1 2017 1.0 3
1 2016 2.8 7
0 2015 0.1 0
0 2014 0.0 0
0 2013 0.5 1
0 2012 0.0 0
0 2011 0.0 0
0 2010 0.0 0
Reference

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

Portland - Recent Years
Portland - Extremes
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