Here's a video from MIT laying out a bit about how the rain leaves that specific smell behind. (via HuffPo Science)
Hailing from Washington, I can happily confirm that yes, as you may have heard, it rains quite a bit there. Somehow, though, we mostly get by just fine. Now, a University of Washington meteorologist has run the numbers to find that our NFL team has not only found ways to live with the rainy, wet conditions
that are par for the course in the Northwest -- they actually thrive in them. The playoff bound Seattle Seahawks are more likely to win home games in rain or snow, and not by just a little.