Which months give vitamin D from the sun in Mexico City?

All year: there is no month in Mexico City 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 Mexico City today?

In Mexico City the skin makes vitamin D while the UV index reaches 3: today that runs from 09:00 to 17:00. At the best moment about 3 minutes with an average skin type and a quarter of the body uncovered is enough for roughly 1000 IU.

Vitamin D window09:00–17:00

In the sun, at the best moment3 minutes

Sunrise06:19

Sunset18:58

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 Mexico City, 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 Mexico City vitamin D guide

Sun and vitamin D in Mexico City: common questions

What time should you get sun in Mexico City today?: Between 09:00 and 17:00: that is the stretch where the UV index reaches 3 in Mexico City, the minimum at which skin makes vitamin D. At the best moment about 3 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 Mexico City today?: Today the sun rises at 06:19 and sets at 18:58 in Mexico City, with 12 h 39 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 Mexico City?: All year: there is no month in Mexico City when the UV index stops reaching 3 on most days. What changes from month to month is how long the window lasts.