The sun and the clock in Guatemala City (2026)
Guatemala City lies at 90.5°W. Its time zone, UTC−6, is built around the 90°W meridian. The two very nearly coincide: solar noon — the moment the sun is highest — falls at about 12:02, which is as close to true solar time as a zone this wide can get. The zone holds UTC−6 all year — there is no daylight saving here.
The longest day of 2026 is 22 June, with 13h of daylight. The shortest is 22 December, with 11h 16m. The swing between them is 1h 44m. Inside the tropics the day length stays within a narrow band all year.
The earliest sunrise and the latest sunset do not land on the longest day. In Guatemala City the sun comes up earliest on 3 June at 05:32, while the latest sunset waits until 10 July at 18:36. The equation of time is what separates them: the Earth's elliptical orbit and axial tilt move solar noon back and forth by several minutes over the year.
The sky stays usably light for a while after the sun goes down. In Guatemala City that civil twilight runs about 21 minutes at the equinox.
Every figure in this section is computed from the city's own latitude, longitude and IANA time zone using NOAA solar algorithms (Spencer, 1971), accurate to about ±2 arcminutes below 65° latitude.