Weather and Moods

I've never officially studied what science calls "seasonal affective disorder", sometimes called cabin fever, but I know enough to say "duh"!  Does it really take scientific research to confirm how seasons and weather affect mood?  For those living in cold winter climates, I'm guessing you can attest to the need to get outside ASAP once the snow starts melting and the sun starts shining.  For my local friends, I think it can happen even in summer-you know-when it's over 100 degrees for days or months at a time and you're stuck inside.  Personally, I need sunlight (or is that SONlight) regularly and the feeling of freedom that I get from being outside regularly.  We've had about 3 days of perfect weather now and I notice that I'm in a better mood, able to adjust better to things that might have triggered stress last week as a result of spending time outside.  I'm indoors writing this right now because I got too warm while sitting outside.  I do feel fresh and rejuvinated though!