We had 3 nights in July in the 30's and the last two nights have been 42. Have to love the high elevation. My first year planting sweet corn and I am not sure if the temps are to blame but in only grew 3'-4' it looks super healthy and is dark green but it just didn't grow. It is starting to put ears on. My MIL texted me today that our new friend, the bear, flattened some of it. I don't care much about the corn but when he starts tearing down apple trees he is going to be in a gots to go situation.