Which months give vitamin D from the sun in Oslo?

May to August. For the rest of the year the UV index in Oslo stays below 3 on most days, even at noon.

Vitamin D today

Is there vitamin D in Oslo today?

In Oslo the UV index does not reach 3 at any point today, and below that minimum the skin makes no vitamin D however long the exposure lasts. What decides it is not how high the sun gets but how much UVB reaches the ground: with the sun this oblique, the ozone layer absorbs nearly all of it.

Vitamin D window: None today
In the sun, at the best moment: —
Sunrise: 07:46
Sunset: 18:22

Clear-sky figures: cloud lowers the UV index and lengthens the time needed.

Why tomorrow is not the same

The window moves with the height of the sun, which changes every day, and with the ozone column over Oslo, which varies with the season. It is not one fixed fact about the city: it runs much longer in some months than in others, and at high enough latitudes there are months when it never opens.

See the Oslo vitamin D guide

Sun and vitamin D in Oslo: common questions

What time should you get sun in Oslo today?: No hour works. Today the UV index does not reach 3 in Oslo at any point of the day, and below that minimum the skin makes no vitamin D however long the exposure lasts.
What time are sunrise and sunset in Oslo today?: Today the sun rises at 07:46 and sets at 18:22 in Oslo, with 10 h 36 min of daylight. Most of that light does nothing for vitamin D: only the stretch where the UV index reaches 3 counts.
Which months give vitamin D from the sun in Oslo?: May to August. For the rest of the year the UV index in Oslo stays below 3 on most days, even at noon.

Oslo: we'll tell you the days you can make vitamin D.

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