Much of the southern part of the USA experienced its warmest summer on record this year. Below are temperature graphs (max, min, averages) for two of the places that smashed records by a wide margin: Wichita Falls (Texas) and Shreveport (Louisiana). For the summer (June-August) Wichita Falls averaged 3.4F more than average! Its previous record for 100F days was 79 while this year it recorded 98.
Finally, I include below the temperature graph for Phoenix, Arizona which had a record number of 110F days (43.3C) for a summer – 33. Its August was its equal hottest month on record (with July 2009). It is most likely the hottest big city in the western world in terms of summer temperatures.
The data for the above graphs is taken from accuweather.com.