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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 Mays in Arizona 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.

#10. May 1996
- Average temperature: 69.6°F
- Monthly high temperature: 86.4°F
- Monthly low temperature: 52.9°F
- Total precipitation: 0.09"

#9. May 1958
- Average temperature: 69.7°F
- Monthly high temperature: 86°F
- Monthly low temperature: 53.3°F
- Total precipitation: 0.4"

#8. May 2006
- Average temperature: 70°F
- Monthly high temperature: 87°F
- Monthly low temperature: 53°F
- Total precipitation: 0.05"

#5. May 2020 (tie)
- Average temperature: 70.5°F
- Monthly high temperature: 87.5°F
- Monthly low temperature: 53.5°F
- Total precipitation: 0.11"

#5. May 1997 (tie)
- Average temperature: 70.5°F
- Monthly high temperature: 86.4°F
- Monthly low temperature: 54.6°F
- Total precipitation: 0.37"

#5. May 1934 (tie)
- Average temperature: 70.5°F
- Monthly high temperature: 86.9°F
- Monthly low temperature: 54.2°F
- Total precipitation: 0.64"

#3. May 2009 (tie)
- Average temperature: 70.8°F
- Monthly high temperature: 86.2°F
- Monthly low temperature: 55.4°F
- Total precipitation: 0.74"

#3. May 2001 (tie)
- Average temperature: 70.8°F
- Monthly high temperature: 87.6°F
- Monthly low temperature: 54°F
- Total precipitation: 0.37"

#2. May 1984
- Average temperature: 70.9°F
- Monthly high temperature: 87.9°F
- Monthly low temperature: 53.8°F
- Total precipitation: 0.12"

#1. May 2000
- Average temperature: 71.2°F
- Monthly high temperature: 88.2°F
- Monthly low temperature: 54.2°F
- Total precipitation: 0.02"