Lately, in much of Nebraska and South Dakota the difference between the daily high temperature and the daily low temperature has been unusually large– something like forty degrees Fahrenheit, whereas something more like twenty-five degrees would be more expected. The reasons for the unusually high temperatures in the afternoons (and, to a lesser extent the low temperatures overnight) are somewhat complicated, but one key factor has been the extremely dry air that has been established over this part of the country for the last few weeks. What does humidity have to do with either the overnight low temperatures or the afternoon highs? Tune in to learn more about this and other factors that influence the diurnal temperature range.
Actually, the article on Wikipedia about the diurnal temperature range is not bad at all.
For accurate forecasts in your area, we always recommend Unisys Weather.