While we're on the subject, one of the sources for sugar snap peas writes "yields well in both hot and cold weather." Does anyone here have experience growing this particular cultivar in hot weather? I'm curious when they will quit, as my pole beans are taking them over. I will have to sacrifice them in not too much longer, as there is not room for them and all the beans that are growing in. I'm hoping I can get away with cutting the peas of at the ground, and stripping their leaves, because the beans are grown up all around their stems. There is no way I could extricate them.
To the OP: you might still get a bit of luck. At my daughter's preschool, they planted some peas around the same time you did. I went over and built them a trellis a couple weeks ago (they are not all that skilled at garden planning). It looked to me like they weren't going to do much of anything. But last week I saw them starting to find the trellis, and a couple of them were flowering.