I hear ya. Our growing season is about 90 days, and this year it was about 2 weeks shorter because it was too cold to plant in the beginning of June. My tomatoes are just now starting to set fruit, as are my cucurbits. If we get a cold snap, that's pretty much it for us. We can get frosts in August. No where near as bad as you've had, but demoralizing. I've been trying to grow melons up here for years, and have managed to get some small hybrid (yet tasty) cantaloupe, but that's it. Anything that takes over 80 days is pretty much toast.
It's currently 70 and the humidity is 94%. So I guess it's not the heat, it's the humidity. I took a shower about 40 minutes ago and still haven't completely dried off. We don't have central air conditioning (we have a small unit for the bedroom) so I've just been panting and sweating. I have a massive zit on my face from all the sweating. It's fabulous. At least I look like I'm 17 again