The dew point is the temperature that the air would have to be cooled to (at constant pressure) in order to reach saturation. As the temperature drops to the dew point, water vapor molecules condense.

(WHTM) — When temperatures rise, sometimes the air can feel dry and comfortable. But, sometimes it can feel downright tropical outside. This is caused by moisture in the air and it makes the air ...

The heat index is a measure of how hot it really feels on your body when relative humidity is factored in with the actual air temperature. Since heat index values were devised for shady, light wind ...

The wind chill and heat index charts were created to give ranges when weather conditions can become too dangerous to be ...

If you’re looking for a single number that’ll help you best determine whether or not it’s muggy outside, you’ll want to give this a read. On Tuesday afternoon, it was 71 degrees with a 56 degree ...

NORFOLK, Va. — Most summer days, you hear us talk about “humidity” when describing how the air feels. While many people are familiar with the term relative humidity — the percentage of water vapor in ...

Both terms are related to the amount of moisture in the air, but they have very different meanings. Air can hold only a certain maximum amount of water vapor at any given temperature. Dew point is ...

I have always thought that at very low temperatures, say zero degrees or lower, the air would be dry. However, I have observed that the relative humidity is usually quite high when temperatures are ...

With astronomical summer right around the corner this upcoming Thursday, it's about time we enter a period of excessive heat across eastern Iowa. Actual air temperatures will climb into the 90s in ...