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In 2022, the continental United States experienced its , according to data from the National Oceanic and Atmospheric Administration, while 20 states saw one of their in the same month. The year prior, July marked the .

Climate change is driving rising temperatures and more record heat. The has climbed each decade since 1880 by about .14 degrees Fahrenheit, or roughly 2 degrees Fahrenheit total.

compiled a ranking of the hottest Julys in Delaware since 1895 using data from the . 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.

#9. July 2013 (tie)
- Average temperature: 79.2°F
- Monthly high temperature: 87.8°F
- Monthly low temperature: 70.6°F
- Total precipitation: 6.57"

#9. July 1999 (tie)
- Average temperature: 79.2°F
- Monthly high temperature: 89.9°F
- Monthly low temperature: 68.4°F
- Total precipitation: 2.21"

#8. July 2016
- Average temperature: 79.6°F
- Monthly high temperature: 89°F
- Monthly low temperature: 70.1°F
- Total precipitation: 5.53"

#6. July 2025 (tie)
- Average temperature: 79.7°F
- Monthly high temperature: 88.8°F
- Monthly low temperature: 70.5°F
- Total precipitation: 7.33"

#6. July 1955 (tie)
- Average temperature: 79.7°F
- Monthly high temperature: 89.8°F
- Monthly low temperature: 69.6°F
- Total precipitation: 1.98"

#5. July 2019
- Average temperature: 79.8°F
- Monthly high temperature: 90.2°F
- Monthly low temperature: 69.4°F
- Total precipitation: 3.41"

#4. July 2010
- Average temperature: 79.9°F
- Monthly high temperature: 90.3°F
- Monthly low temperature: 69.5°F
- Total precipitation: 4.29"

#3. July 2011
- Average temperature: 80.6°F
- Monthly high temperature: 91.6°F
- Monthly low temperature: 69.6°F
- Total precipitation: 3.7"

#2. July 2020
- Average temperature: 80.7°F
- Monthly high temperature: 90.6°F
- Monthly low temperature: 70.7°F
- Total precipitation: 6.37"

#1. July 2012
- Average temperature: 80.9°F
- Monthly high temperature: 91.1°F
- Monthly low temperature: 70.7°F
- Total precipitation: 3.16"