We're coming up on the "dog days of summer" and the heat is on for most of the country. This cool map below shows you the average days when a specific area sees their warmest day of the year. It varies throughout the country from early June through September.
My area of southern Connecticut, typically sees the warmest day of the year in the time period of July 15 - 20. Parts of Arizona and New Mexico peak in the latter days of June, While the immediate west coast peaks as late as the end of September!
This is another awesome map from NOAA! Check out their Tornado Warning Map.