Hottest Mays in Delaware since 1895

Written by:
May 12, 2026
Andrzej Kubik // Shutterstock

Hottest Mays in Delaware since 1895

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 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.

#10. May 2011 (tie)
- Average temperature: 66.4°F
- Monthly high temperature: 77°F
- Monthly low temperature: 55.8°F
- Total precipitation: 2.38"

#10. May 1911 (tie)
- Average temperature: 66.4°F
- Monthly high temperature: 79.8°F
- Monthly low temperature: 53°F
- Total precipitation: 0.68"

#8. May 1944 (tie)
- Average temperature: 66.6°F
- Monthly high temperature: 78.4°F
- Monthly low temperature: 54.9°F
- Total precipitation: 1.89"

#8. May 1896 (tie)
- Average temperature: 66.6°F
- Monthly high temperature: 77.2°F
- Monthly low temperature: 55.9°F
- Total precipitation: 3.03"

#7. May 1918
- Average temperature: 66.8°F
- Monthly high temperature: 77.8°F
- Monthly low temperature: 55.8°F
- Total precipitation: 3.23"

#6. May 2019
- Average temperature: 66.9°F
- Monthly high temperature: 76.6°F
- Monthly low temperature: 57.2°F
- Total precipitation: 4.48"

#5. May 2012
- Average temperature: 67.8°F
- Monthly high temperature: 77.9°F
- Monthly low temperature: 57.7°F
- Total precipitation: 2.44"

#4. May 2015
- Average temperature: 67.9°F
- Monthly high temperature: 79.1°F
- Monthly low temperature: 56.8°F
- Total precipitation: 1.5"

#3. May 2018
- Average temperature: 68.3°F
- Monthly high temperature: 78.5°F
- Monthly low temperature: 58.1°F
- Total precipitation: 6.99"

#2. May 1991
- Average temperature: 68.5°F
- Monthly high temperature: 80.5°F
- Monthly low temperature: 56.6°F
- Total precipitation: 1.61"

#1. May 2004
- Average temperature: 69.6°F
- Monthly high temperature: 80°F
- Monthly low temperature: 59.2°F
- Total precipitation: 3.15"

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