Before becoming domesticated, peas grew in the wild!
Pea production slows down once temps reach 70 degrees.
Over 75 degrees they will stop bearing fruit, and existing pods will not fill out. Time to remove them from the garden. Pea roots are rich in nitrogen, so you wont to leave them in the ground. Remove the vines by cutting them off at the base. The vines can go into your compost pile as long as they are not disease or pest infested.
Plant peas again in the mid to late summer for a fall crop.