Today’s test instruments calculate relative humidity using dry and wet bulb temperatures. If you’ve been around the industry for a while, you’ve probably twirled around a sling-psychrometer to obtain ...

The heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. The index offers important ...

To convert between the dew point and relative humidity, several approximations have been proposed over the last 200 years, but they all require a calculator or mathematical tables, and most ...

The chart is a grid where you can find the heat index temperature by looking at the air temperature and relative humidity. For example, the NWS says if it's 96 outside and the humidity is 65%, the ...

On Tuesday afternoon, it was 71 degrees with a 56 degree dewpoint in Minneapolis. That calculated out to a 59 percent relative humidity. If you’re trying to figure out how […] ...

Sometimes the temperature outside feels warmer than it is, and there's a reason. Here's a breakdown of the heat index.

Using a formula, meteorologists calculate relative humidity based on how close the air temperature is to the dew point temperature. The closer they are to each other, the higher the humidity level.