Sunny days make me depressed?

Ever since I was a kid I've loved rain. Clouds, snow, sleet, hail, any kind of covering or precipitation would automatically make it a good day. Its so much easier to get up in the morning without the loud beams of irritating light saying "rise and shine ************" To me a sunny day with no clouds is bad weather, stretches of long sun make me depressed. Its not the heat that bothers me, I hate sunny days even more in the winter. Its just the light and that depressingly empty blue abyss. The sun is an annoyance when not covered by clouds. Anyone know why I am like this? Why do sunny days make me depressed and rainy ones improve my mood? Is this something like seasonal affective disorder?