INDIANAPOLIS — Despite how it sounds, relative humidity isn’t a great measure of how humid it feels outside. That’s why, when it’s muggy, meteorologists talk about dew point temperature instead.

Meteorologist Paul Douglas answers reader questions about the weather and other natural phenomena every couple of weeks.

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.

Every summer, I get asked this question: "Why don't you use relative humidity? I don't care about the dew point." The thing is - you should care about the dew point more. The dew point is quite ...