You might be surprised to learn that sunny, cold weather is an ideal condition for solar panels to perform optimally—and that extremely hot climates actually make solar panels less efficient. As far as snow is concerned, a light dusting of snow has little impact on the panels and can be easily blown off by wind. Because panels are tilted at an angle, snow will also slide off panels over time, cleaning them as it melts. Interestingly enough, due to the reflectivity, or albedo effect, of snow, having snow on the ground near the panels can contribute toward them producing more electricity because the smooth white surface reflects light like a mirror.