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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 California 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. May 2020 (tie)
- Average temperature: 64.6°F
- Monthly high temperature: 78.4°F
- Monthly low temperature: 50.9°F
- Total precipitation: 1.2"

#9. May 2014 (tie)
- Average temperature: 64.6°F
- Monthly high temperature: 78.8°F
- Monthly low temperature: 50.5°F
- Total precipitation: 0.35"

#9. May 2006 (tie)
- Average temperature: 64.6°F
- Monthly high temperature: 78.5°F
- Monthly low temperature: 50.7°F
- Total precipitation: 0.73"

#9. May 1940 (tie)
- Average temperature: 64.6°F
- Monthly high temperature: 78.8°F
- Monthly low temperature: 50.4°F
- Total precipitation: 0.68"

#8. May 1924
- Average temperature: 64.9°F
- Monthly high temperature: 80.2°F
- Monthly low temperature: 49.5°F
- Total precipitation: 0.07"

#7. May 1947
- Average temperature: 65°F
- Monthly high temperature: 79.5°F
- Monthly low temperature: 50.5°F
- Total precipitation: 0.48"

#6. May 1984
- Average temperature: 65.3°F
- Monthly high temperature: 79.8°F
- Monthly low temperature: 50.7°F
- Total precipitation: 0.39"

#5. May 1931
- Average temperature: 65.5°F
- Monthly high temperature: 79.8°F
- Monthly low temperature: 51.2°F
- Total precipitation: 0.96"

#4. May 2009
- Average temperature: 66.7°F
- Monthly high temperature: 80.6°F
- Monthly low temperature: 52.7°F
- Total precipitation: 1.24"

#3. May 1992
- Average temperature: 67°F
- Monthly high temperature: 80.9°F
- Monthly low temperature: 53°F
- Total precipitation: 0.23"

#2. May 1997
- Average temperature: 67.6°F
- Monthly high temperature: 81.8°F
- Monthly low temperature: 53.3°F
- Total precipitation: 0.38"

#1. May 2001
- Average temperature: 68.6°F
- Monthly high temperature: 83.8°F
- Monthly low temperature: 53.3°F
- Total precipitation: 0.15"