Question 1

How many hours of daylight does Vientiane get today?

Accepted Answer

Vientiane currently gets approximately 13 hours and 1 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. Because Vientiane is near the equator, day length stays relatively consistent, typically between 11 and 13 hours. Our calculations use the SunCalc astronomical library for accuracy within 1–2 minutes.

Question 2

What time does the sun rise in Vientiane?

Accepted Answer

Sunrise times in Vientiane change throughout the year based on the Earth's axial tilt and the city's position at 18.0° 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. Near the equator, sunrise times vary by less than an hour across the year. All sunrise calculations are based on NOAA solar position algorithms via the SunCalc library.

Question 3

What time does the sun set in Vientiane?

Accepted Answer

Sunset times in Vientiane vary by season due to the Earth's orbital mechanics and the city's latitude of 18.0°. 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. Near the equator, sunset times remain fairly consistent throughout the year, typically varying by less than an hour.

Question 4

How does day length change throughout the year in Vientiane?

Accepted Answer

Vientiane is located near the equator at 18.0° latitude, so day length varies relatively little throughout the year — typically between about 11 and 13 hours. The sun rises and sets at roughly the same time year-round, and twilight transitions are short and abrupt compared to higher latitudes. This consistency makes Vientiane one of the more predictable locations for planning outdoor activities. The slight variation that does occur peaks around the equinoxes in March and September.

Question 5

What is civil twilight in Vientiane?

Accepted Answer

Civil twilight in Vientiane 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). Near the equator, civil twilight is relatively short, typically lasting only 20–25 minutes. The exact duration for Vientiane 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 Vientiane.

Question 7

When is the longest day in Vientiane?

Accepted Answer

The longest day in Vientiane occurs around the summer solstice. For Vientiane in the Northern Hemisphere, the longest day is around June 20–21. On this date, Vientiane experiences its earliest sunrise and near-latest sunset of the year. Near the equator, the longest day is only slightly longer than the shortest, differing by about 1–2 hours. The shortest day (winter solstice) occurs approximately six months later.

Question 8

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

Accepted Answer

Vientiane 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 Vientiane compared to cities that observe DST, where clock changes create abrupt jumps in the schedule.

Astronomical Dawn	4:27:08 AM
Nautical Dawn	4:55:28 AM
Civil Dawn	5:23:10 AM
Sunrise	5:46:36 AM
Golden Hour End	6:17:10 AM
Solar Noon	12:17:07 PM
Golden Hour Start	6:17:03 PM
Sunset	6:47:37 PM
Civil Dusk	7:11:04 PM
Nautical Dusk	7:38:45 PM
Astronomical Dusk	8:07:05 PM
Day Length	13h 1m

Moonrise	3:29:30 PM
Moonset	2:35:12 AM
Moon Phase	🌔 Waxing Gibbous
Illumination	83%

Date	Sunrise	Sunset	Day Length	Moonrise	Moonset	Phase
Jul 1, Wed	5:38 AM	6:50 PM	13h 11m	7:58 PM	—	🌕
Jul 2, Thu	5:38 AM	6:50 PM	13h 11m	8:41 PM	7:20 AM	🌖
Jul 3, Fri	5:39 AM	6:50 PM	13h 11m	9:19 PM	8:13 AM	🌖
Jul 4, Sat	5:39 AM	6:50 PM	13h 11m	9:56 PM	9:07 AM	🌖
Jul 5, Sun	5:39 AM	6:50 PM	13h 10m	10:32 PM	10:00 AM	🌖
Jul 6, Mon	5:40 AM	6:50 PM	13h 10m	11:08 PM	10:52 AM	🌗
Jul 7, Tue	5:40 AM	6:50 PM	13h 10m	11:47 PM	11:47 AM	🌗
Jul 8, Wed	5:40 AM	6:50 PM	13h 10m	12:28 AM	12:44 PM	🌗
Jul 9, Thu	5:41 AM	6:50 PM	13h 9m	1:14 AM	1:44 PM	🌗
Jul 10, Fri	5:41 AM	6:50 PM	13h 9m	2:05 AM	2:48 PM	🌘
Jul 11, Sat	5:41 AM	6:50 PM	13h 8m	3:04 AM	3:55 PM	🌘
Jul 12, Sun	5:42 AM	6:50 PM	13h 8m	4:07 AM	5:01 PM	🌘
Jul 13, Mon	5:42 AM	6:50 PM	13h 8m	5:15 AM	6:05 PM	🌑
Jul 14, Tue	5:42 AM	6:49 PM	13h 7m	6:21 AM	7:02 PM	🌑
Jul 15, Wed	5:43 AM	6:49 PM	13h 7m	—	7:53 PM	🌑
Jul 16, Thu	5:43 AM	6:49 PM	13h 6m	7:24 AM	8:38 PM	🌒
Jul 17, Fri	5:43 AM	6:49 PM	13h 6m	8:24 AM	9:18 PM	🌒
Jul 18, Sat	5:44 AM	6:49 PM	13h 5m	9:20 AM	9:56 PM	🌒
Jul 19, Sun	5:44 AM	6:49 PM	13h 5m	10:14 AM	10:31 PM	🌒
Jul 20, Mon	5:44 AM	6:48 PM	13h 4m	11:06 AM	11:06 PM	🌓
Jul 21, Tue	5:45 AM	6:48 PM	13h 3m	11:57 AM	11:43 PM	🌓
Jul 22, Wed	5:45 AM	6:48 PM	13h 3m	12:50 PM	12:20 AM	🌓
Jul 23, Thu	5:45 AM	6:48 PM	13h 2m	1:43 PM	1:02 AM	🌓
Jul 24, Fri	5:46 AM	6:47 PM	13h 2m	2:36 PM	1:47 AM	🌔
Jul 25, Sat	5:46 AM	6:47 PM	13h 1m	3:29 PM	2:35 AM	🌔
Jul 26, Sun	5:46 AM	6:47 PM	13h 0m	4:20 PM	3:26 AM	🌔
Jul 27, Mon	5:47 AM	6:46 PM	13h 0m	5:09 PM	4:19 AM	🌔
Jul 28, Tue	5:47 AM	6:46 PM	12h 59m	5:55 PM	5:12 AM	🌕
Jul 29, Wed	5:47 AM	6:46 PM	12h 58m	6:37 PM	6:06 AM	🌕
Jul 30, Thu	5:48 AM	6:45 PM	12h 58m	7:17 PM	6:59 AM	🌕
Jul 31, Fri	5:48 AM	6:45 PM	12h 57m	7:54 PM	—	🌕

Sunrise & Sunset in Vientiane, Laos

Sun Times

Moon

Monthly Summary — July 2026

Twilight Phases in Vientiane

Explore Vientiane

Frequently Asked Questions about Sunrise & Sunset in Vientiane

Sunrise & Sunset in Other Cities