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I’m not sure I understand why living in a northern state prevents you from getting sun exposure for part of the year. Is it cold out? Sure. But if the benefits are as much as they seem to be for you, I’d endure some cold exposure in order to get that sun therapy.

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The sun can’t be at too much of an angle or the UVB can’t get through the atmosphere.

It has to do with UVB rays, rather than UVA rays. UVB rays only show up where I live from mid April to around October. Other months of the year, the Sun is too low in the sky and those rays bounce off of the atmosphere. The closer you are to the equator, the more yearly coverage you get of UVB rays.

Interesting

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