Philadelphia - Temperature Averages by Decade





Summarized here are the temperatures extending over seven decades at Philadelphia, Pennsylvania. 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 Philadelphia International Airport.

High Temperature for Each Decade

Average daily maximum temperature at Philadelphia
High °F Decade High °C
65.8 2010s 18.8
64.6 2000s 18.1
65.2 1990s 18.4
63.7 1980s 17.6
63.6 1970s 17.6
62.5 1960s 17.0
64.1 1950s 17.8

Low Temperature for Each Decade

Average daily minimum temperature at Philadelphia
Low °F Decade Low °C
48.9 2010s 9.4
47.6 2000s 8.7
47.6 1990s 8.6
45.4 1980s 7.4
46.0 1970s 7.8
43.6 1960s 6.4
46.1 1950s 7.8

Hot Days per Decade

Total days per year on average when the temperature in Philadelphia reached at least 70 or 90 °F
Decade 70 °F
21 °C
90 °F
32 °C
2010s 172 34
2000s 164 23
1990s 163 31
1980s 158 26
1970s 162 22
1960s 156 17
1950s 160 26

Cold Days per Decade

Total days per year on average when the temperature in Philadelphia dropped to 0 or 32 °F or lower
Decade 0 °F
-18 °C
32 °F
0 °C
2010s 0 76
2000s 0 82
1990s 0 77
1980s 1 95
1970s 1 91
1960s 0 108
1950s 0 86
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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