Washington DC Temperature Averages by Decade

Summarized here are the temperatures extending over seven decades at Washington, DC. 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 Reagan National Airport near downtown Washington.

High Temperature for Each Decade

Average daily maximum temperature at Washington
High °F	Decade	High °C
68.4	2010s	20.2
66.5	2000s	19.2
67.2	1990s	19.6
66.6	1980s	19.2
67.1	1970s	19.5
66.0	1960s	18.9
66.1	1950s	19.0

Low Temperature for Each Decade

Average daily minimum temperature at Washington
Low °F	Decade	Low °C
51.6	2010s	10.9
49.8	2000s	9.9
49.6	1990s	9.8
49.4	1980s	9.7
49.4	1970s	9.6
47.3	1960s	8.5
48.7	1950s	9.3

Hot Days per Decade

Total days per year on average when the temperature in Washington reached at least 70 or 90 °F
Decade	70 °F 21 °C	90 °F 32 °C
2010s	186	49
2000s	176	29
1990s	176	41
1980s	176	40
1970s	183	35
1960s	175	37
1950s	173	32

Cold Days per Decade

Total days per year on average when the temperature in Washington dropped to 0 or 32 °F or lower
Decade	0 °F -18 °C	32 °F 0 °C
2010s	0	54
2000s	0	66
1990s	0	61
1980s	0	67
1970s	0	66
1960s	0	83
1950s	0	71

Washington - 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 Washington