Many Cool Season Plants do not grow well during hot weather. When it get hot the plant closes the stomata in order to save water. With the stomata closed the plant
cannot make any sugar which will cause the plant to stress and suffer damage or
eventual death. This process is called:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the answer is 95 degrees