Hottest Mays in Pennsylvania since 1895
In 2022, the continental United States experienced its third hottest July since 1895, according to data from the National Oceanic and Atmospheric Administration, while 20 states saw one of their 10 hottest days in the same month. The year prior, July marked the hottest month on record worldwide.
Climate change is driving rising temperatures and more record heat. The Earth's temperature has climbed each decade since 1880 by about .14 degrees Fahrenheit, or roughly 2 degrees Fahrenheit total.
Stacker compiled a ranking of the hottest Mays in Pennsylvania since 1895 using data from the National Centers for Environmental Information. Rankings are based on the highest average temperature in each month. For each of the hottest months listed below, we've included the average state temperature, state-wide highs and lows for the month, and the total precipitation.
#10. May 1998
- Average temperature: 62.4°F
- Monthly high temperature: 73.7°F
- Monthly low temperature: 51°F
- Total precipitation: 4.36"
#8. May 2015 (tie)
- Average temperature: 63.4°F
- Monthly high temperature: 76.2°F
- Monthly low temperature: 50.6°F
- Total precipitation: 2.57"
#8. May 2004 (tie)
- Average temperature: 63.4°F
- Monthly high temperature: 75.4°F
- Monthly low temperature: 51.4°F
- Total precipitation: 5.44"
#7. May 1896
- Average temperature: 63.5°F
- Monthly high temperature: 75°F
- Monthly low temperature: 52°F
- Total precipitation: 3.01"
#6. May 1911
- Average temperature: 63.6°F
- Monthly high temperature: 77.9°F
- Monthly low temperature: 49.3°F
- Total precipitation: 1.91"
#4. May 2012 (tie)
- Average temperature: 63.7°F
- Monthly high temperature: 75.6°F
- Monthly low temperature: 51.9°F
- Total precipitation: 5.1"
#4. May 1918 (tie)
- Average temperature: 63.7°F
- Monthly high temperature: 76.1°F
- Monthly low temperature: 51.4°F
- Total precipitation: 5.2"
#3. May 2018
- Average temperature: 64°F
- Monthly high temperature: 75.9°F
- Monthly low temperature: 52°F
- Total precipitation: 5.48"
#1. May 1991 (tie)
- Average temperature: 64.4°F
- Monthly high temperature: 77.2°F
- Monthly low temperature: 51.5°F
- Total precipitation: 2.23"
#1. May 1944 (tie)
- Average temperature: 64.4°F
- Monthly high temperature: 77.4°F
- Monthly low temperature: 51.3°F
- Total precipitation: 4.38"
Copyright 2026 Stacker Media, LLC
This story was originally published May 12, 2026 at 11:33 AM.