By multiplying the difference between the dew point and the air temperature by 5, and subtracting from 100% they get the relative humidity, which can then be compared with the reading on a hygrometer.

The dew point and relative humidity are closely related, but the former is much more useful than the latter. Relative humidity helps meteorologists predict conditions favorable for wildfires and fog.

The relative humidity is 100 percent when the dew point and the temperature are the same. If the temperature drops any further, condensation will result, and liquid water will begin to form.

If the dew point was also 32F, there would be 3.8 grams of water in the air. On that particular day the relative humidity would be 100%, but you certainly wouldn’t notice it beyond scraping the ...

Another example would be in the winter. If the air temperature were 45 degrees and the dewpoint were 40 degrees, you're dealing with 85% relative humidity. That sounds really steamy!

Look at today. In the morning we had a temperature of 74 degrees, a dew point of 70, and a “Relative” humidity of 87%.

The dew point temperature is the temperature to which air must be cooled in order for its relative humidity to be 100 percent (because as air is cooled, its ability to hold water vapor decreases.

Like with relative humidity, a high dew point will also make it feel hotter outside. If you're in a place with a high dew point and a high air temperature, sweat simply can't evaporate fast enough ...

Dew point vs. relative humidity The short answer is both terms are different and describe different things about moisture in the air. The dew point is another temperature value.

For example, a temperature of 30 degrees and a dew point of 30 will give you a relative humidity of 100%. Therefore, a 70-degree day with 50% relative humidity would feel more humid than a 40 ...

If it is 100 degrees and the dew point is 72 degrees, relative humidity would be 40 percent. So we meteorologists prefer the consistent message that comes with dew point.