s
Want some proof? How about this?
In 2012, the US set records for the warmest spring, the largest seasonal departure from average temperature, the warmest year-to-date, and the warmest 12-month period. Records have been kept since 1895.
http://www.climatecentral.org/news/warmest-spring-year-and-12-month-period-in-us/
I can only assume this isn’t all you have. What else?