Portland OR Temperature Averages by Decade

Summarized here are the temperatures extending over eight decades at Portland, Oregon. Listed for every decade from the 1940s to the 2010s are averages for maximum and minimum daily temperatures in degrees Fahrenheit and Celsius. That's followed with information on the number of hot and cold days.

Each decade covers a standard 10-year range. For instance the 1990s includes weather measurements from Jan 1, 1990 to Dec 31, 1999. All the temperature data were collected at Portland International Airport.

High Temperature for Each Decade

Average daily maximum temperature at Portland
High °F	Decade	High °C
63.6	2010s	17.5
63.0	2000s	17.2
63.4	1990s	17.5
62.9	1980s	17.2
62.5	1970s	17.0
62.0	1960s	16.7
61.2	1950s	16.2
62.3	1940s	16.8

Low Temperature for Each Decade

Average daily minimum temperature at Portland
Low °F	Decade	Low °C
46.6	2010s	8.1
45.8	2000s	7.7
46.0	1990s	7.8
45.2	1980s	7.3
44.4	1970s	6.9
43.7	1960s	6.5
43.6	1950s	6.5
44.6	1940s	7.0

Hot Days per Decade

Total days per year on average when the temperature in Portland reached at least 70 or 90 °F
Decade	70 °F 21 °C	90 °F 32 °C
2010s	129	17
2000s	124	14
1990s	125	13
1980s	122	13
1970s	121	13
1960s	116	9
1950s	110	8
1940s	120	10

Cold Days per Decade

Total days per year on average when the temperature in Portland dropped to 32 °F or lower
Decade	32 °F 0 °C
2010s	31
2000s	34
1990s	30
1980s	38
1970s	44
1960s	44
1950s	45
1940s	43

Portland - Temperature Averages by Decade

High Temperature for Each Decade

Low Temperature for Each Decade

Hot Days per Decade

Cold Days per Decade

Reference

More on Temperatures in Portland