Yeah the morning dew/moistness is common in the NW, I lived with it for 25 years. As far as I can tell though, becuase of the rain, the moistness, at least in Seattle and Portland it's possibly the cleanest air to breathe. I'm sure breathing cold air such as that is detrimental to your health if you do it too long anywhere though.

Here's a positive note about it though. Because the air is so clean, i became very symptom free as I got older with regards to my asthma. If you want proof of the cleanliness, when I first met my ex, she lived in B'more. When I first visited her, coming from Seattle, the very first night in MD I was in the ER myself due to the air quality and humidity change.

Between MD and Seattle, I'd choose Seattle without hesitation but between NC and WA, I love NC. some of the beauty of the NW, clean air, similar climate without as much rain. I love it here and am staying put.