Longest and shortest day in Ulan Bator
In Ulan Bator, Mongolia, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 16h 2m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 8h 23m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:56 | 19:04 | 12h 8m |
| June solstice | Sunday, 21 June 2026 | 04:53 | 20:55 | 16h 2m |
| September equinox | Tuesday, 22 September 2026 | 06:38 | 18:51 | 12h 13m |
| December solstice | Monday, 21 December 2026 | 08:38 | 17:01 | 8h 23m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 08:37 | 17:26 | 8h 49m |
| February | 07:59 | 18:14 | 10h 14m |
| March | 07:06 | 18:56 | 11h 50m |
| April | 06:04 | 19:41 | 13h 37m |
| May | 05:14 | 20:23 | 15h 9m |
| June | 04:52 | 20:53 | 16h 0m |
| July | 05:08 | 20:47 | 15h 39m |
| August | 05:46 | 20:06 | 14h 19m |
| September | 06:29 | 19:05 | 12h 37m |
| October | 07:11 | 18:04 | 10h 54m |
| November | 07:57 | 17:15 | 9h 18m |
| December | 08:34 | 16:59 | 8h 25m |
Why the day gets longer and shorter in Ulan Bator
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Ulan Bator leans toward the Sun for part of the year and away for the rest. When it leans toward the Sun the days lengthen and the Sun climbs higher; half a year later the opposite happens. The size of the swing depends on how far Ulan Bator sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Ulan Bator
When is the longest day in Ulan Bator?
The longest day in Ulan Bator falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 16h 2m of daylight, sunrise at 04:53 and sunset at 20:55.
When is the shortest day in Ulan Bator?
The shortest day in Ulan Bator falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 8h 23m of daylight, sunrise at 08:38 and sunset at 17:01.
How much does day length change through the year in Ulan Bator?
Between the longest and shortest day, Ulan Bator gains and loses about 7h 39m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Ulan Bator's coordinates with SunCalc, not looked up from a table.