Question 1

How many hours of daylight does Buenos Aires get today?

Accepted Answer

Buenos Aires currently gets approximately 11 hours and 35 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 34.6° latitude, Buenos Aires 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 Buenos Aires?

Accepted Answer

Sunrise times in Buenos Aires change throughout the year based on the Earth's axial tilt and the city's position at 34.6° 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 Buenos Aires?

Accepted Answer

Sunset times in Buenos Aires vary by season due to the Earth's orbital mechanics and the city's latitude of 34.6°. 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 Buenos Aires?

Accepted Answer

Buenos Aires at 34.6° 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 Buenos Aires?

Accepted Answer

Civil twilight in Buenos Aires 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 Buenos Aires 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 Buenos Aires.

Question 7

When is the longest day in Buenos Aires?

Accepted Answer

The longest day in Buenos Aires occurs around the summer solstice. For Buenos Aires in the Southern Hemisphere, the longest day is around December 21–22. On this date, Buenos Aires experiences its earliest sunrise and near-latest sunset of the year. At 34.6° 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 Buenos Aires?

Accepted Answer

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

Astronomical Dawn	5:42:14 AM
Nautical Dawn	6:11:27 AM
Civil Dawn	6:40:37 AM
Sunrise	7:05:49 AM
Golden Hour End	7:39:28 AM
Solar Noon	12:53:05 PM
Golden Hour Start	6:06:42 PM
Sunset	6:40:20 PM
Civil Dusk	7:05:33 PM
Nautical Dusk	7:34:43 PM
Astronomical Dusk	8:03:56 PM
Day Length	11h 35m

Moonrise	4:53:26 AM
Moonset	3:03:36 PM
Moon Phase	🌘 Waning Crescent
Illumination	14%

Date	Sunrise	Sunset	Day Length	Moonrise	Moonset	Phase
Sep 1, Tue	7:14 AM	6:36 PM	11h 22m	10:19 PM	9:17 AM	🌖
Sep 2, Wed	7:12 AM	6:36 PM	11h 24m	11:29 PM	9:56 AM	🌗
Sep 3, Thu	7:11 AM	6:37 PM	11h 26m	12:42 AM	10:40 AM	🌗
Sep 4, Fri	7:09 AM	6:38 PM	11h 28m	1:53 AM	11:35 AM	🌗
Sep 5, Sat	7:08 AM	6:38 PM	11h 30m	3:01 AM	12:38 PM	🌗
Sep 6, Sun	7:07 AM	6:39 PM	11h 32m	4:02 AM	1:50 PM	🌘
Sep 7, Mon	7:05 AM	6:40 PM	11h 35m	4:53 AM	3:03 PM	🌘
Sep 8, Tue	7:04 AM	6:41 PM	11h 37m	5:35 AM	4:15 PM	🌘
Sep 9, Wed	7:03 AM	6:41 PM	11h 39m	6:10 AM	5:25 PM	🌑
Sep 10, Thu	7:01 AM	6:42 PM	11h 41m	6:41 AM	6:31 PM	🌑
Sep 11, Fri	7:00 AM	6:43 PM	11h 43m	7:08 AM	7:36 PM	🌑
Sep 12, Sat	6:58 AM	6:43 PM	11h 45m	7:35 AM	8:38 PM	🌑
Sep 13, Sun	6:57 AM	6:44 PM	11h 47m	8:01 AM	—	🌒
Sep 14, Mon	6:55 AM	6:45 PM	11h 49m	8:30 AM	9:40 PM	🌒
Sep 15, Tue	6:54 AM	6:45 PM	11h 51m	9:00 AM	10:42 PM	🌒
Sep 16, Wed	6:53 AM	6:46 PM	11h 54m	9:36 AM	11:43 PM	🌒
Sep 17, Thu	6:51 AM	6:47 PM	11h 56m	10:17 AM	12:42 AM	🌓
Sep 18, Fri	6:50 AM	6:47 PM	11h 58m	11:04 AM	1:39 AM	🌓
Sep 19, Sat	6:48 AM	6:48 PM	12h 0m	11:56 AM	2:29 AM	🌓
Sep 20, Sun	6:47 AM	6:49 PM	12h 2m	12:53 PM	3:14 AM	🌓
Sep 21, Mon	6:45 AM	6:50 PM	12h 4m	1:53 PM	3:54 AM	🌔
Sep 22, Tue	6:44 AM	6:50 PM	12h 6m	2:53 PM	4:27 AM	🌔
Sep 23, Wed	6:43 AM	6:51 PM	12h 9m	3:54 PM	4:59 AM	🌔
Sep 24, Thu	6:41 AM	6:52 PM	12h 11m	4:55 PM	5:25 AM	🌔
Sep 25, Fri	6:40 AM	6:52 PM	12h 13m	5:56 PM	5:52 AM	🌕
Sep 26, Sat	6:38 AM	6:53 PM	12h 15m	6:58 PM	6:18 AM	🌕
Sep 27, Sun	6:37 AM	6:54 PM	12h 17m	8:04 PM	6:46 AM	🌕
Sep 28, Mon	6:35 AM	6:55 PM	12h 19m	—	7:16 AM	🌖
Sep 29, Tue	6:34 AM	6:55 PM	12h 21m	9:12 PM	7:51 AM	🌖
Sep 30, Wed	6:33 AM	6:56 PM	12h 24m	10:24 PM	8:32 AM	🌖

Sunrise & Sunset in Buenos Aires, Argentina

Sun Times

Moon

Monthly Summary — September 2026

Twilight Phases in Buenos Aires

Holidays in Argentina

Explore Buenos Aires

Frequently Asked Questions about Sunrise & Sunset in Buenos Aires

Sunrise & Sunset in Other Cities