On a calm, clear night, the ground cools very efficiently by radiating heat back into the atmosphere. This lowers the ...

Relative humidity is roughly equal to the dew point divided by the air temperature (multiplied by 100 to get your percentage). Let's set up a winter scenario. You wake up in the morning.

This week, there has been lots of discussion regarding the dew point and how it relates to humidity. While most of us have probably heard of the dew point, do you actually know what it is?