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 ...

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

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 heat index, or apparent temperature, combines air temperature and humidity to indicate how hot it feels to the body. High humidity slows sweating, the body's natural cooling system, making ...

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 […] ...

To find out, let’s dive into what dewpoint is and what relative humidity is. Dewpoint is a more direct measure of moisture in the air. So as the air cools to the dewpoint temperature, the air ...

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 ...

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.