The science behind global warming predicts that all the extra energy in the atmosphere will stimulate more extreme weather, both hot and cold. Just because it is snowing now doesn’t mean this hasn’t been the hottest decade in thousands of years. Likewise, just because it sometimes rains in the desert doesn’t mean that deserts don’t exist and aren’t (generally) dry. Or as Colbert put it, “It is dark outside, so we can only assume that the sun has been destroyed”.