Seattle WA Temperature Averages by Decade

Summarized here are the temperatures extending over seven decades at Seattle, Washington. Listed for every decade from the 1950s 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 Seattle—Tacoma International Airport.

High Temperature for Each Decade

Average daily maximum temperature at Seattle
High °F	Decade	High °C
61.1	2010s	16.1
59.5	2000s	15.3
60.4	1990s	15.8
59.6	1980s	15.3
59.3	1970s	15.2
59.2	1960s	15.1
58.1	1950s	14.5

Low Temperature for Each Decade

Average daily minimum temperature at Seattle
Low °F	Decade	Low °C
46.4	2010s	8.0
44.9	2000s	7.2
45.3	1990s	7.4
44.5	1980s	7.0
44.7	1970s	7.0
44.3	1960s	6.8
42.4	1950s	5.8

Hot Days per Decade

Total days per year on average when the temperature in Seattle reached at least 70 or 90 °F
Decade	70 °F 21 °C	90 °F 32 °C
2010s	102	6
2000s	85	3
1990s	95	3
1980s	83	3
1970s	86	4
1960s	83	3
1950s	75	2

Cold Days per Decade

Total days per year on average when the temperature in Seattle dropped to 0 or 32 °F or lower
Decade	0 °F -18 °C	32 °F 0 °C
2010s	0	22
2000s	0	28
1990s	0	27
1980s	0	31
1970s	0	31
1960s	0	32
1950s	0	48

Seattle - 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 Seattle