Looks like summers have been pretty hot too. 7 of the top 15 (since 1879) have occurred on or after 2002, and 10 have occurred on or after 1991. All of them within a degree of the mythical dust bowl summer of 1936.
Further, of the years with the most maximum temperatures at or above 80, 5 of the top 10 have occurred since 2007, and 7 of 10 since 1991.