What Is The Dew Point?

Tools

By By Steve Pool

SEATTLE - The dew point is the temperature at which the air becomes 100% saturated -- as in, it can't hold any more water vapor. When the temperature and dew point are close together, that's when we get fog. But the lower the dew point, the drier the air.

For example, if the temperature is 80 degrees with a dew point of 60, that feels quite humid. But if it's 80 degrees with a dew point of 45 degrees, that's much drier and more comfortable.

East of the Rockies, dew points can range from 60-70 degrees, which feels quite humid. Around here, the dew points are mainly between 45 and 55 degrees in summer, which keeps the weather very comfortable -- even on warm days.

For More Information:

KOMO Weather FAQ

Your Photos

YouNews Up! Up! And away! Up! Up! And away!
When I saw this dramatic cloud to the north, it reminded me of smoke, rising in billows until it hits the jet stream, then it's pulled hundreds of miles east. I had to capture it quickly. Within minutes the effect had faded.
YouNews Inside an osprey nest Inside an osprey nest
For my girlfriends birthday we had a party at her parents. We knew the nest was there but the owner hadn't seen or heard the osprey for a day or two. He asked me to fly my drone up and see if any was wrong. I flew up and found that there were two eggs inside.
YouNews Our Garden Our Garden
The growing season has been great.

The secret to this garden is simple.
I used recycled grass clippings.