Question 1

How many hours of daylight does Ulaanbaatar get today?

Accepted Answer

Ulaanbaatar currently gets approximately 13 hours and 12 minutes of daylight today. This varies throughout the year — days are longest around the summer solstice (June in the Northern Hemisphere, December in the Southern Hemisphere) and shortest around the winter solstice. At 47.9° latitude, Ulaanbaatar sees moderate variation, with summer days noticeably longer than winter days. Our calculations use the SunCalc astronomical library for accuracy within 1–2 minutes.

Question 2

What time does the sun rise in Ulaanbaatar?

Accepted Answer

Sunrise times in Ulaanbaatar change throughout the year based on the Earth's axial tilt and the city's position at 47.9° latitude. Use the table above to see today's exact sunrise time, as well as dawn (civil twilight) and other twilight phases. The earliest sunrise typically occurs around the summer solstice, while the latest sunrise happens near the winter solstice. The difference between earliest and latest sunrise can be over two hours. All sunrise calculations are based on NOAA solar position algorithms via the SunCalc library.

Question 3

What time does the sun set in Ulaanbaatar?

Accepted Answer

Sunset times in Ulaanbaatar vary by season due to the Earth's orbital mechanics and the city's latitude of 47.9°. Check the table above for today's exact sunset time, including dusk and twilight phases. The latest sunset typically occurs a few days after the summer solstice, while the earliest sunset happens a few days before the winter solstice. At mid-latitudes, you can expect sunset to vary by 2–3 hours across the seasons.

Question 4

How does day length change throughout the year in Ulaanbaatar?

Accepted Answer

Ulaanbaatar at 47.9° latitude experiences moderate seasonal day length variation. Summer days are noticeably longer than winter days, with daylight typically ranging from about 8 to 16 hours depending on the time of year. The rate of change is fastest around the equinoxes (March and September), when day length changes by several minutes each day. Around the solstices, the rate of change slows as day length approaches its maximum or minimum. This makes spring and autumn the seasons with the most noticeable daily changes in sunrise and sunset times.

Question 5

What is civil twilight in Ulaanbaatar?

Accepted Answer

Civil twilight in Ulaanbaatar is the period when the sun is between 0° and 6° below the horizon. During civil twilight, there is enough natural light for most outdoor activities without artificial lighting. It occurs just before sunrise (dawn) and just after sunset (dusk). At mid-latitudes, civil twilight typically lasts about 25–35 minutes. The exact duration for Ulaanbaatar is shown in the twilight data table above.

Question 6

What are the different twilight phases?

Accepted Answer

There are three twilight phases, each defined by the sun's angle below the horizon. Civil twilight (0°–6°) is the brightest phase, with enough light for outdoor activities without artificial lighting. Nautical twilight (6°–12°) is dimmer but still allows sailors to see the horizon for celestial navigation. Astronomical twilight (12°–18°) is nearly dark, with only the faintest glow on the horizon, and most stars become visible. Below 18° is considered full astronomical night. The duration of each phase varies by latitude and season — our data table above shows all twilight phases for Ulaanbaatar.

Question 7

When is the longest day in Ulaanbaatar?

Accepted Answer

The longest day in Ulaanbaatar occurs around the summer solstice. For Ulaanbaatar in the Northern Hemisphere, the longest day is around June 20–21. On this date, Ulaanbaatar experiences its earliest sunrise and near-latest sunset of the year. At 47.9° latitude, the longest day is typically 14–16 hours of daylight. The shortest day (winter solstice) occurs approximately six months later.

Question 8

Does daylight saving time affect sunrise and sunset times in Ulaanbaatar?

Accepted Answer

Ulaanbaatar does not observe daylight saving time, so sunrise and sunset times change only due to natural seasonal variation throughout the year. The gradual shift in sunrise and sunset times follows a smooth curve driven by the Earth's axial tilt and orbital position. This makes it easier to predict sunrise and sunset patterns in Ulaanbaatar compared to cities that observe DST, where clock changes create abrupt jumps in the schedule.

Astronomical Dawn	4:25:23 AM
Nautical Dawn	5:06:22 AM
Civil Dawn	5:44:45 AM
Sunrise	6:16:34 AM
Golden Hour End	6:57:43 AM
Solar Noon	12:52:47 PM
Golden Hour Start	6:47:50 PM
Sunset	7:28:59 PM
Civil Dusk	8:00:48 PM
Nautical Dusk	8:39:12 PM
Astronomical Dusk	9:20:10 PM
Day Length	13h 12m

Moonrise	11:37:13 PM
Moonset	4:08:06 PM
Moon Phase	🌗 Last Quarter
Illumination	40%

Date	Sunrise	Sunset	Day Length	Moonrise	Moonset	Phase
Sep 1, Tue	6:11 AM	7:37 PM	13h 26m	8:45 PM	10:50 AM	🌖
Sep 2, Wed	6:12 AM	7:35 PM	13h 22m	9:11 PM	12:12 PM	🌖
Sep 3, Thu	6:13 AM	7:33 PM	13h 19m	9:46 PM	1:36 PM	🌗
Sep 4, Fri	6:15 AM	7:31 PM	13h 16m	10:34 PM	2:58 PM	🌗
Sep 5, Sat	6:16 AM	7:28 PM	13h 12m	11:37 PM	4:08 PM	🌗
Sep 6, Sun	6:17 AM	7:26 PM	13h 9m	12:53 AM	5:04 PM	🌘
Sep 7, Mon	6:19 AM	7:24 PM	13h 6m	2:17 AM	5:44 PM	🌘
Sep 8, Tue	6:20 AM	7:22 PM	13h 2m	3:43 AM	6:14 PM	🌘
Sep 9, Wed	6:21 AM	7:20 PM	12h 59m	5:04 AM	6:37 PM	🌘
Sep 10, Thu	6:23 AM	7:18 PM	12h 55m	6:23 AM	6:57 PM	🌑
Sep 11, Fri	6:24 AM	7:16 PM	12h 52m	7:39 AM	7:12 PM	🌑
Sep 12, Sat	6:26 AM	7:14 PM	12h 49m	—	7:28 PM	🌑
Sep 13, Sun	6:27 AM	7:12 PM	12h 45m	8:52 AM	7:44 PM	🌒
Sep 14, Mon	6:28 AM	7:10 PM	12h 42m	10:05 AM	8:03 PM	🌒
Sep 15, Tue	6:30 AM	7:08 PM	12h 38m	11:18 AM	8:23 PM	🌒
Sep 16, Wed	6:31 AM	7:06 PM	12h 35m	12:29 PM	8:51 PM	🌒
Sep 17, Thu	6:32 AM	7:04 PM	12h 32m	1:36 PM	9:24 PM	🌓
Sep 18, Fri	6:34 AM	7:02 PM	12h 28m	2:36 PM	10:09 PM	🌓
Sep 19, Sat	6:35 AM	7:00 PM	12h 25m	3:26 PM	11:04 PM	🌓
Sep 20, Sun	6:36 AM	6:57 PM	12h 21m	4:06 PM	12:06 AM	🌓
Sep 21, Mon	6:38 AM	6:55 PM	12h 18m	4:38 PM	1:13 AM	🌔
Sep 22, Tue	6:39 AM	6:53 PM	12h 14m	5:02 PM	2:23 AM	🌔
Sep 23, Wed	6:40 AM	6:51 PM	12h 11m	5:22 PM	3:35 AM	🌔
Sep 24, Thu	6:42 AM	6:49 PM	12h 7m	5:40 PM	4:47 AM	🌔
Sep 25, Fri	6:43 AM	6:47 PM	12h 4m	5:55 PM	5:59 AM	🌕
Sep 26, Sat	6:44 AM	6:45 PM	12h 1m	6:11 PM	7:13 AM	🌕
Sep 27, Sun	6:46 AM	6:43 PM	11h 57m	6:29 PM	—	🌕
Sep 28, Mon	6:47 AM	6:41 PM	11h 54m	6:48 PM	8:30 AM	🌕
Sep 29, Tue	6:49 AM	6:39 PM	11h 50m	7:11 PM	9:51 AM	🌖
Sep 30, Wed	6:50 AM	6:37 PM	11h 47m	7:43 PM	11:14 AM	🌖

Sunrise & Sunset in Ulaanbaatar, Mongolia

Sun Times

Moon

Monthly Summary — September 2026

Twilight Phases in Ulaanbaatar

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Frequently Asked Questions about Sunrise & Sunset in Ulaanbaatar

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