Summer Mowing Heights
Your grass appreciates a higher mowing height during the hot summer months. Consider bumping your mower setting up a notch to leave your grass at the taller end of this range for your type of grass. (These suggested heights are after you mow):
2-1/2 to 3 inches for Bluegrass, Ryegrass and Fine Fescue
3 to 4 inches for Tall Fescue and Buffalograss
3 to 4 inches for St. Augustinegrass
1-1/2 to 2 inches for Bermudagrass, Centipedegrass and Zoysia
Then around September you could drop down to the lower end of the range for your grass type.