Stutter per season

Stutter per season It has been a few weeks now and my stutter has become way worse. I feel like this always happends in winter. I used to blame it on getting a cold, but right now I don't have a cold. I also don't feel extra depressed or stressed just normal. I think it has to do with blue monday and everything. Less sunlight makes you unconciously more depressed? I am not sure and I am curious if you guys have the same.