NOAA’s Climate Extreme Index shows that contiguous US summer afternoons have been getting hotter and are record hot now.
“Percentage of the United States with maximum temperatures much above normal”
U.S. Climate Extremes Index (CEI) | Graph | National Centers for Environmental Information (NCEI)
NOAA’s state climate summaries shows that hot afternoons have become much less frequent.
Wyoming – State Climate Summaries 2022
USHCN daily temperature data shows that the percentage of the US reaching 95F has dropped sharply since the 1930s.
The National Climate Assessment also shows a sharp decline in heatwaves.
Temperature Changes in the United States – Climate Science Special Report
