I cannot handle the heat. Anything over 25c really has me but even 20+ is getting uncomfortable. And I don't just mean don't like, I reckon I start to have something akin to system malfunction! I walked the dog this morning, I thought it'd be cooler/fresher after a thunderstorm, but it was muggy and I noticed I was both tiring and becoming irritable.
I don't ride July and August as a rule, unless very early and then only 60 - 90 minutes. Just seen a group of blokes ride past, some shirtless, and it's maybe 28 or 30 out. No way would I be out. I hide inside during the day!