Yes, it sucks to be walking or running on pavement, with no shade, when it's hot. Some hotter weather is approaching here, as well as humidity, so I even alter my riding to either early AM or very shady routes, which thankfully, are not hard to find here. I am just thankful that here in New England those hot, humid days usually come in short spurts of 2-4 days and are not for 2 months. You are right, it is always cooler in the woods!