An LJ friend of mine who used to go on this forum posted this website on her LJ.
RainyMood.com
It plays a 30-minute loop of the sound of heavy rain. Very soon after it started, it made my skin, especially the tops of my arms, feel cooler and chillier and I started feeling goosebumps. Isn't that unusual how the body can react like that? Did you have a similar reaction?