Vitamin D

The sun, month by month

Sunrise and sunset in Mexico City in January

On January 1 in Mexico City the sun rises at 07:11 and sets at 18:10; on day 31 it rises at 07:12 and sets at 18:28. Over the month the day grows 17 minutes longer.

Sunrise07:14
Sunset18:18
Golden hour17:46–18:18
Day length11 h 05 min

Where does the sun rise and set in Mexico City in January?

Where it risesEast112°
Where it setsWest248°

Mid-January in Mexico City: the sun rises in the east — a bearing of 112°, measured from true north — and sets in the west, at 248°. That is 22° south of due east at sunrise, and the same 22° south of due west at sunset. From the 1st to the last day of the month both points shift 6° north.

Approximate bearings: they can be a couple of degrees out. They are measured from true north, not the north a phone compass points to.

Day by day

All times are local to Mexico City. Dawn and dusk mark civil twilight.

DayDawnSunriseSunsetDuskDay length
106:4707:1118:1018:3410 h 59 min
206:4707:1118:1018:3410 h 59 min
306:4807:1118:1118:3510 h 59 min
406:4807:1218:1118:3511 h 00 min
506:4807:1218:1218:3611 h 00 min
606:4807:1218:1318:3611 h 00 min
706:4907:1218:1318:3711 h 01 min
806:4907:1318:1418:3811 h 01 min
906:4907:1318:1418:3811 h 02 min
1006:4907:1318:1518:3911 h 02 min
1106:5007:1318:1618:3911 h 03 min
1206:5007:1318:1618:4011 h 03 min
1306:5007:1318:1718:4011 h 03 min
1406:5007:1418:1818:4111 h 04 min
1506:5007:1418:1818:4211 h 05 min
1606:5007:1418:1918:4211 h 05 min
1706:5007:1418:1918:4311 h 06 min
1806:5007:1418:2018:4311 h 06 min
1906:5007:1418:2118:4411 h 07 min
2006:5007:1418:2118:4511 h 08 min
2106:5007:1418:2218:4511 h 08 min
2206:5007:1418:2218:4611 h 09 min
2306:5007:1418:2318:4611 h 09 min
2406:5007:1318:2418:4711 h 10 min
2506:5007:1318:2418:4711 h 11 min
2606:5007:1318:2518:4811 h 12 min
2706:5007:1318:2518:4911 h 12 min
2806:5007:1318:2618:4911 h 13 min
2906:5007:1318:2718:5011 h 14 min
3006:4907:1318:2718:5011 h 15 min
3106:4907:1218:2818:5111 h 16 min

Approximate astronomical values: they can shift a minute or two from year to year.

What about vitamin D in January?

In January, the typical synthesis window in Mexico City runs from 10:00 to 16:00: with medium skin and a t-shirt, ~6 min at the best moment is enough.

See the Mexico City vitamin D guide

Common questions about the sun in Mexico City in January

Where does the sun set in Mexico City in January?
Mid-January in Mexico City: the sun sets in the west, a bearing of 248° measured from true north, which is 22° south of due west. It rises in the east, at 112°. Over the month both points shift 6° north.
How much daylight does Mexico City gain in January?
Over January the day gets 17 minutes longer in Mexico City: on January 1 the sun rises at 07:11 and sets at 18:10, and on day 31 it rises at 07:12 and sets at 18:28.
How many hours of daylight does Mexico City get in January?
In mid-January the day lasts 11 h 05 min in Mexico City, from sunrise at 07:14 to sunset at 18:18. The table has the day length for each of the 31 days of the month.
What time does it start to get light in Mexico City in January?
In mid-January the sky starts to get light at 06:50 in Mexico City, when the sun is 6° below the horizon, and the sun itself does not rise until 07:14. The “Dawn” column of the table gives that time for every day of the month.
What time does it get dark in Mexico City in January?
It's not the same time as sunset. In mid-January in Mexico City the sun sets at 18:18, but there is still light: civil twilight does not end until 18:42, when the sun reaches 6° below the horizon and usable outdoor light runs out. The “Dusk” column of the table gives that time day by day.
What time of day can you make vitamin D in Mexico City in January?
In mid-January, between 10:00 and 16:00: that is the stretch of the day when the UV index reaches 3 in Mexico City, the minimum for the skin to make vitamin D. At the best moment of the day about 6 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.