Every year around November and December in the UK, I came to realise that I was really effected by the British weather. My overall mood would become bad, tiredness, lack of motivation and feelings of depression would come about which I couldn't get rid of. After such re-occuring feelings over many years, I put it down to SAD. I would exercise regularly, eat healthy and generally carry on as normal but the same feelings would come about.
After spending 2 years living and working in Australia and now Thailand, I have come to the conclusion that it definitely was the weather effecting me. My outlook is more positive and I rarely get any feelings such as what I felt at home during the winter months. Maybe the palm trees have something to do with it?!