Where American summers changed most since 1961

City	Hot day	1961-1990	2015-2024	Added
Miami	87.3F	11.4	56.8	45.4
Las Vegas	105.4F	9.5	40.2	30.7
Denver	89.4F	9.6	39.6	30
Salt Lake City	93.1F	9.7	37.2	27.5
Chicago	85.5F	10	21.7	11.7
New York	87.9F	11	20.9	9.9
Philadelphia	90.1F	10.7	20	9.3
Boston	88F	10.4	19.5	9.1
Dallas	98.5F	10.2	19.3	9.1
Portland	89.5F	10.8	19.1	8.3
Phoenix	110.3F	9.5	16.2	6.7
Houston	95.3F	10.3	16.7	6.4
Minneapolis	88F	10	15.9	5.9
Detroit	86.7F	10.3	15.6	5.3
Atlanta	92F	9.9	13.8	3.9
Kansas City	94.1F	9.7	11.4	1.7
Seattle	82.6F	10.7	12.4	1.7
Nashville	93.3F	9.8	11.4	1.6
Washington	92.8F	10.5	12	1.5

Last updated 2026-08-15.

Sources. ERA5 reanalysis via the Open-Meteo archive, daily maximum 2 m air temperature.