Well, Melissa had it right with her post today - we are definitely all affected to one degree or another by the weather and the change in daylight exposure. I think our bodies are programmed to kind of shut down during cold weather and lower levels of daylight exposure. Winter is designed to save our fat! Dang it! No wonder we love carbs so much in the winter.
Thinking about weight loss efforts in years past, I was asking myself, "Why do I have such a hard time losing weight in the winter, in fact I tend to gain weight, but it's much easier in the spring and summer?" Plus, in relation to my battles with anxiety and depression, I knew I had harder times starting in late fall and going until spring. And click! I put the two together, weight loss struggles and depression, and I think it's related to the season. I may want to start using some form of light therapy and see if it makes a difference. Melissa, could you tell us more about the light lamp you have, and where you got it from?
Here's an article about SAD I found on Wikipedia: Seasonal Affective Disorder, if you want to read more about it.