Question 1

How many hours of daylight does Ulaanbaatar get today?

Accepted Answer

Ulaanbaatar currently gets approximately 12 hours and 59 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	4:37:40 AM
Nautical Dawn	5:17:42 AM
Civil Dawn	5:55:31 AM
Sunrise	6:27:03 AM
Golden Hour End	7:08:01 AM
Solar Noon	12:56:38 PM
Golden Hour Start	6:45:15 PM
Sunset	7:26:13 PM
Civil Dusk	7:57:45 PM
Nautical Dusk	8:35:34 PM
Astronomical Dusk	9:15:36 PM
Day Length	12h 59m

Moonrise	10:21:22 PM
Moonset	7:16:32 AM
Moon Phase	🌖 Waning Gibbous
Illumination	95%

Date	Sunrise	Sunset	Day Length	Moonrise	Moonset	Phase
Apr 1, Wed	6:33 AM	7:21 PM	12h 49m	6:49 PM	6:23 AM	🌕
Apr 2, Thu	6:31 AM	7:23 PM	12h 52m	8:00 PM	6:38 AM	🌕
Apr 3, Fri	6:29 AM	7:24 PM	12h 56m	9:10 PM	6:56 AM	🌕
Apr 4, Sat	6:27 AM	7:26 PM	12h 59m	10:21 PM	7:16 AM	🌖
Apr 5, Sun	6:25 AM	7:27 PM	13h 3m	11:30 PM	7:43 AM	🌖
Apr 6, Mon	6:23 AM	7:29 PM	13h 6m	12:35 AM	—	🌖
Apr 7, Tue	6:21 AM	7:30 PM	13h 9m	1:34 AM	8:18 AM	🌖
Apr 8, Wed	6:19 AM	7:31 PM	13h 13m	2:23 AM	9:04 AM	🌗
Apr 9, Thu	6:17 AM	7:33 PM	13h 16m	3:02 AM	10:00 AM	🌗
Apr 10, Fri	6:15 AM	7:34 PM	13h 20m	3:34 AM	11:05 AM	🌗
Apr 11, Sat	6:13 AM	7:36 PM	13h 23m	3:58 AM	12:15 PM	🌗
Apr 12, Sun	6:11 AM	7:37 PM	13h 27m	4:18 AM	1:28 PM	🌘
Apr 13, Mon	6:09 AM	7:39 PM	13h 30m	4:36 AM	2:43 PM	🌘
Apr 14, Tue	6:07 AM	7:40 PM	13h 33m	4:52 AM	3:58 PM	🌘
Apr 15, Wed	6:05 AM	7:41 PM	13h 37m	5:08 AM	5:13 PM	🌘
Apr 16, Thu	6:03 AM	7:43 PM	13h 40m	5:27 AM	6:31 PM	🌑
Apr 17, Fri	6:01 AM	7:44 PM	13h 43m	5:48 AM	7:53 PM	🌑
Apr 18, Sat	5:59 AM	7:46 PM	13h 47m	6:13 AM	9:17 PM	🌑
Apr 19, Sun	5:57 AM	7:47 PM	13h 50m	6:48 AM	10:43 PM	🌒
Apr 20, Mon	5:55 AM	7:49 PM	13h 53m	7:37 AM	12:05 AM	🌒
Apr 21, Tue	5:54 AM	7:50 PM	13h 56m	—	1:15 AM	🌒
Apr 22, Wed	5:52 AM	7:51 PM	14h 0m	8:40 AM	2:10 AM	🌒
Apr 23, Thu	5:50 AM	7:53 PM	14h 3m	9:55 AM	2:50 AM	🌓
Apr 24, Fri	5:48 AM	7:54 PM	14h 6m	11:19 AM	3:19 AM	🌓
Apr 25, Sat	5:46 AM	7:56 PM	14h 9m	12:43 PM	3:41 AM	🌓
Apr 26, Sun	5:45 AM	7:57 PM	14h 13m	2:03 PM	4:00 AM	🌔
Apr 27, Mon	5:43 AM	7:59 PM	14h 16m	3:20 PM	4:14 AM	🌔
Apr 28, Tue	5:41 AM	8:00 PM	14h 19m	4:34 PM	4:29 AM	🌔
Apr 29, Wed	5:39 AM	8:01 PM	14h 22m	5:46 PM	4:44 AM	🌔
Apr 30, Thu	5:38 AM	8:03 PM	14h 25m	6:56 PM	5:01 AM	🌕

Sunrise & Sunset in Ulaanbaatar, Mongolia

Sun Times

Moon

Monthly Summary — April 2026

Twilight Phases in Ulaanbaatar

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Frequently Asked Questions about Sunrise & Sunset in Ulaanbaatar

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