Peas can handle some frost. Now is a good time to plant them in zone 5. You can also plant lettuce, kale, chard, radishes, dill and other short season crops. Wait till October to plant garlic and spinach, which will winter over.

Agree. They are quite frost tolerant, just not hard freeze tolerant so planting now should be ideal for you. I can't plant mine until mid-September as it is still far too hot for them til then.

Dave