Just Say No to Abuse Declaring War on Terrorism. If you've been feeling down and you can't seem to shake it, it may not be psychological. Seasonal Afffective Disorder is caused by a deficiency of sunlight.
Studies show that the short, gray days of winter bring fewer ultraviolet rays.
Plus, cold temperatures can keep us from spending as much time outdoors, beneath the sun. The end result can be depression. You hit the nail on the head, Amy Those of us here in NW WA get our share of gray. Amazing how much we talk of sunshine when it comes. The end of the SAD period is upon us.