Philadelphia - Coldest Decades





The coldest decades on record are ranked here for Philadelphia, Pennsylvania. The lists include decades when Philadelphia had the lowest average temperatures, the fewest hot days and the most cold days. These extremes are for temperatures observed at Philadelphia International Airport and cover seven decades, from the 1950s to the 2010s.

That is when Philadelphia had weather measurements that are consistent and complete enough to compare decades. Each decade comprises a standard 10-year range. For instance, the 1990s includes measurements from Jan 1, 1990 to Dec 31, 1999. An exception is the 2010s which so far includes data to the end of 2018. Links to the data behind these lists are in the References section on this page.

Coolest High Temperatures

Average daily maximum temperature at Philadelphia
High °F Decade High °C
Lowest 62.5 1960s 17.0
Runner-up 63.6 1970s 17.6

Coldest Low Temperatures

Average daily minimum temperature at Philadelphia
Low °F Decade Low °C
Lowest 43.6 1960s 6.4
Runner-up 45.4 1980s 7.4

Fewest Warm Days

Total days per year on average when Philadelphia had temperatures of at least 70 °F (21 °C)
Days Decade
Lowest 156 1960s
Runner-up 158 1980s

Fewest Hot Days

Total days per year on average when Philadelphia had temperatures of at least 90 °F (32 °C)
Days Decade
Lowest 17 1960s
Runner-up 22 1970s

Most Freezing Days

Total days per year on average when Philadelphia had temperatures of 32 °F (0 °C) or lower
Days Decade
Highest 108 1960s
Runner-up 95 1980s
References

Current Results. 2019. Philadelphia PA Temperature Averages by Decade

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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