Dew point is a measure of moisture in the air. Dew points above 70° feel tropical, dew points above 60° feel humid. In the winter, if dew points drop below 0, it indicates a very dry and cold air mass ...

Much of the eastern U.S. has been enduring high humidity combined with hot temperatures. The plunge southward of much drier air is happening. Here’s how far south the comfortable humidity levels will ...