I found today that although I went on the exact same route for the exact same pathetic 3.5 miles I was not tired and sweaty and exhausted and miserable. It was because the temp was about 8-10 degrees less. I have always been adversely affected by heat. Now that doesn't mean I could have ridden further than 3.5 miles today, but at least it was more comfortable. I'll keep plugging away, and I really do appreciate the tips and encouragement. Somehow I don't think I'll ever be that successful in temps > 82 degrees

I wish I had a compatible riding partner. The DH is being nice but deep down inside he is impatient and very stressful to ride with.