I have just started cycling as a hobby. I purchased an older Schwinn road bike and typically bike 10-15 miles 3 times weekly. However, in Charleston SC the heat has been unbearable lately. With temps in the high 90s and heat index above 110, it is awefully discouraging when I want to go out and ride. I don't mind riding at night but my schedule is such that I couldn't make it a regular thing. Help!!