Typhoons and hurricanes in the Northern Hemisphere spin counterclockwise. Accordingly, when a typhoon passes to our east (as it is doing this time), it pulls air from the north in our direction. This probably has something to do with the cooler temperatures we are experiencing today. Conversely, when a typhoon passes to our west (as happened last week) it pulls hot air from the south in our direction. Of course, I’m sure their are other factors that have led to the difference between last week’s heat and the cool temperatures we are experiencing today.
The animation comes from
http://www.jma.go.jp/jp/gms/smallc.html?area=0&element=0&time=201507162130