>>963382>sun and 25°Cid rather avoid riding in those conditions, and if I really have to I do <70km rides because I can only take 2L of water with me. Snacks are usually not much of a problem, water is. 100km without snacks is perfectly doable when setting off well fed.
fucking heat. At my ideal temperature of about 18-20°C with no sun and a little drizzle every once in a while I can last more than twice as long than at 25°C with the same amount of water and feel much more comfortable doing so. Anything over 20°C with sun is just awful, I hate summer.