Running Tip #11. You can’t control the weather so be prepared for anything from sun and heat to rain and thunderstorms or freezing conditions. If it's raining during a key training session, you may use the dread-mill or skip the run but make an effort to get out there so you have confidence if it rains on race day. Training in the heat with proper hydration is also great practice but avoid extreme winds or ice to prioritize safety above all else. And if you really want to guarantee perfect conditions, run an indoor marathon!