Washington - 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
Reference

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Year, Version 1.0. NOAA National Centers for Environmental Information.

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