Relative humidity measures how much moisture is in the air compared to how much it could hold at a given temperature. It is simply the dew point temperature divided by the air temperature, times 100.

Good news: a weather forecast of 100 percent humidity doesn’t always mean it’s going to rain. Bad news: It might feel absolutely disgusting outside. The percentage of humidity is not measured by the ...

Humidity can make or break a summer day. A sunny day with a temperature of 85 degrees can feel pleasant when the humidity stays low, but once the humidity cranks up, that same day can become ...

The first major heat wave of summer has enveloped much of the midwestern and eastern U.S. in a brutal “dome” of record temperatures and high humidity. The dome phenomenon happens when weather ...

Your home can feel stuffy, chilly, or perfectly “normal” even when the thermostat barely moves, and humidity is the quiet reason why. Once you understand the narrow band of moisture that keeps air ...