This research suggest that it is the number of daylight hours that really matters, not the rain or wind.
This might be quite relevant for those of us who live in places with short winter days.
The one weather variable that really matters to mental health is the amount of sunlight hours, new research finds. Rain, air pollution, wind and high or low temperature have relatively little effect. It is the amount of time between sunrise and sunset that is linked to people’s mental health.