The graph below plots the total number of all time record daily maximums plus record daily minimums set or tied for all 595 GHCN HCN stations which have been active from 1900 to the present. Both record maximums and record minimums have been on the decline, indicating that the climate is becoming less extreme. The year 1936 was by far the most extreme year in US history. It had the coldest February and the second hottest July on record.
NOAA claims that temperature extremes are increasing, because they are incompetent, dishonest, and using bogus statistics (like including recently added stations.) When an Appells-to-Appells comparison is done, the current year doesn’t even crack the top 50.