Which months give vitamin D from the sun in Santiago?

All year: there is no month in Santiago when the UV index stops reaching 3 on most days. What changes from month to month is how long the window lasts.

Vitamin D today

Is there vitamin D in Santiago today?

In Santiago the skin makes vitamin D while the UV index reaches 3: today that runs from 11:00 to 16:00. At the best moment about 10 minutes with an average skin type and a quarter of the body uncovered is enough for roughly 1000 IU.

Vitamin D window11:00–16:00

In the sun, at the best moment10 minutes

Sunrise07:10

Sunset18:19

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 Santiago, 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 Santiago vitamin D guide

Sun and vitamin D in Santiago: common questions

What time should you get sun in Santiago today?: Between 11:00 and 16:00: that is the stretch where the UV index reaches 3 in Santiago, the minimum at which skin makes vitamin D. At the best moment about 10 minutes with an average skin type and a quarter of the body uncovered is enough for roughly 1000 IU.
What time are sunrise and sunset in Santiago today?: Today the sun rises at 07:10 and sets at 18:19 in Santiago, with 11 h 09 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 Santiago?: All year: there is no month in Santiago when the UV index stops reaching 3 on most days. What changes from month to month is how long the window lasts.