|rural Wisconsin, June 2015.|
|Buffalo, N.Y., January 2017|
Living in an area where the skies are so frequently overcast makes it necessary to take vitamin D supplements.
|North Tonawanda, N.Y., January 2017|
|Grand Island, N.Y., steel|
gray winter sky
Edit: Here is the voice of science, as offered by cerebrations.biz: "Overcast- from clouds- does NOT obscure the ultraviolet irradiation. That is the reason why so many folks are shocked that they got sunburn, while at the beach on a cloudy day.
Pollution (some of it) can obscure (or, more correctly, absorb) some of the rays- but not the water vapor in clouds."