Shortest Day of the Year in Mexico City

When is the Winter Solstice?

In Mexico City, the winter solstice—the day with the least daylight—occurs annually on or around December 21 or 22. This is the day when the Earth's axial tilt points the Northern Hemisphere farthest from the Sun, putting the Sun at its lowest arc across the sky in Mexico City.

Because the Sun takes a shallower path through the sky, it both rises later and sets earlier than at any other time of year. Twilight on either end of the day is compressed, and the net result is approximately 11 hours of usable daylight at Mexico City's latitude of 19.43°.

Why does this happen?

The Earth's axis is tilted approximately 23.4° relative to the plane of its orbit. This tilt is what gives us seasons. Around the winter solstice, theNorthern Hemisphere is tilted away from the Sun, so:

• The Sun rises at its southernmost point on the horizon (in the Northern Hemisphere).
• Daytime is at its shortest; nighttime is at its longest.
• The Sun's rays strike the ground at a low angle, spreading energy over a larger area and reducing heating.
• Cities at high latitudes can experience extreme conditions—though not polar night at this latitude.

What changes around the winter solstice?

In the week before and after the winter solstice, daylight length in Mexico City barely changes—shifting by only a minute or two per day. This is the "stillpoint" of the year, where the rate of change is at its slowest. After the solstice, days begin to lengthen again, and the Sun's arc gradually rises toward the north over the following months.

Daily life in Mexico City around the winter solstice

For residents of Mexico City, the winter solstice marks the deepest point of the year. Commute times coincide with dawn and dusk, schools adjust their schedules, and outdoor activity shifts earlier in the day. Cultural and religious traditions across many Northern Hemisphere countries—including Yalda (Persian), Dongzhi (East Asian), and Christmas (Christian)—cluster around this turning point, often celebrating the symbolic "return of the light."

Related tools

• See today's current time in Mexico City including sunrise and sunset.
• Check how many hours of daylight Mexico City gets today—it changes throughout the year.
• Compare with the longest day of the year in Mexico City to see the full seasonal swing.
• View the full sunrise & sunset calendar for Mexico City.