Summer temperature changes in Pennsylvania, New Jersey, Delaware cities

Cities in Pennsylvania, New Jersey and Delaware have seen changes in summer temperatures in the last 50 years. The table below shows changes in average summer temperatures from 1970-2024 and changes in the number of hotter-than-normal days per year*.

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* Hotter-than-normal days are days with temperatures above the 1991-2020 normal summer temperature in each city, calculated by NOAA/NCEI

Chart: Annetta Stogniew Source: Climate Central Created with Datawrapper