Coordinate model
Buenos Aires is computed at 34.60°S, 58.38°W in America/Argentina/Buenos_Aires. The coordinate, not the country or timezone alone, controls the curve.
Daylight curve
Daylight in Buenos Aires, 2026
34.60°S · 58.38°W. Each vertical bar is one day of the year — bar height shows total daylight minutes.
Daylight values are generated from the city coordinates and solar-position math during the page revalidation window.
Longest day
14.5h
2026-12-21
Shortest day
9.8h
2026-06-17
Average
12.1h
Δ seasonal
6h
12h
18h
24h
J
F
M
A
M
J
J
A
S
O
N
D
Today's solar window
Sun and twilight in Buenos Aires
Sunrise
5:47 AM
Solar noon
12:37 PM
Sunset
7:26 PM
Day length
13h 38m
Civil twilight (-6°)
5:20 AM to 7:53 PM
Nautical twilight (-12°)
4:48 AM to 8:25 PM
Astronomical twilight (-18°)
4:13 AM to 9:00 PM
Golden hour1h 43m total
5:31 AM to 6:22 AM · 6:51 PM to 7:42 PM
Blue hour21m total
5:20 AM to 5:31 AM · 7:42 PM to 7:53 PM
Seasonal checkpoints
Solstice and equinox anchors
March equinox
Mar 20
12h 8m
June solstice
Jun 21
9h 50m
September equinox
Sep 22
12h 7m
December solstice
Dec 21
14h 29m
Full-year edge cases: 0 polar-day entries and 0 polar-night entries in the 2026 curve.
City solar dossier
Buenos Aires daylight facts that are not generic
These rows bind the page to Buenos Aires's coordinates, local timezone, annual daylight spread, twilight availability, and peer-city curve rather than a reusable sunrise template.
Annual daylight spread
4h 39m between Jun 17 (9h 50m) and Dec 21 (14h 29m).
Local-date snapshot
Today resolves to sunrise 5:47 AM, solar noon 12:37 PM, and sunset 7:26 PM.
Photographer signal
golden hour today 1h 43m; blue hour today 21m; longest golden-hour day Jun 21 — 1h 52m
Darkness and white-night risk
365 days include astronomical darkness; 0 civil white-night days and 0 astronomical white-night days are modeled in 2026.
Best comparison anchors
Sydney (4h 30m swing); Auckland (5h 3m swing); Los Angeles (4h 32m swing); Perth (4h 11m swing); Tokyo (4h 51m swing)
Solar evidence pack
Why this Buenos Aires sun page is retained
This audit ties the page to a retained city route, exact coordinates, local timezone, a full-year daylight curve, twilight thresholds, and peer-city comparisons.
12/12checks
Retained city route
pass/sun/buenos-aires/ resolves to Buenos Aires, Argentina; the route is generated only from the retained SUN_CITIES list.
Coordinate precision
pass34.60°S, 58.38°W; latitude band mid-latitude band; Southern Hemisphere.
Local timezone
passAmerica/Argentina/Buenos_Aires is used to anchor today's local sunrise, sunset, solar noon, and twilight windows.
Full-year daylight curve
pass365 daily daylight rows were computed for 2026; expected 365.
Annual extremes
passLongest Dec 21 (14h 29m), shortest Jun 17 (9h 50m), average 12h 6m.
Seasonal momentum
passFastest gain Sep 11 (+3m from the previous day); fastest loss Feb 24 (-3m from the previous day); closest 12-hour day Mar 24 at 12h (no change from 12h).
Local-day solar snapshot
passToday: sunrise 5:47 AM, solar noon 12:37 PM, sunset 7:26 PM.
Twilight ladder
passGolden Jun 21 — 1h 52m; blue Dec 21 — 23m; civil Dec 21 — 59m; astronomical night Jun 21 — 11h 9m.
Darkness and white-night model
pass365 days with astronomical darkness; 0 civil white-night days; 0 astronomical white-night days.
Seasonal checkpoints
passMarch equinox: 12h 8m; June solstice: 9h 50m; September equinox: 12h 7m; December solstice: 14h 29m
Peer curve comparison
passSydney (4h 30m); Auckland (5h 3m); Los Angeles (4h 32m); Perth (4h 11m); Tokyo (4h 51m)
Method and citation boundary
passSolar thresholds are NOAA-style; timezone rules use IANA. The page is a planning model, not a legal almanac or obstruction-aware site survey.
Practical read
How to use this solar profile
Photography
1h 43m golden hour today
Best annual golden-hour day: Jun 21 — 1h 52m. Blue-hour total today: 21m.
Astronomy
365 true-darkness days
Longest astronomical-night entry: Jun 21 — 11h 9m. Use local cloud cover and moon phase separately.
Outdoor routine
13h 38m daylight today
Sunrise 5:47 AM and sunset 7:26 PM are the practical day-boundaries for school runs, work windows, and outdoor activity.
Seasonal planning
4h 39m annual swing
December average 14h 26m; June average 9h 52m. This is the year-scale gap to check before travel or outdoor scheduling.
Travel comparison
10 retained peer curves
Buenos Aires's closest daylight-pattern peers here include Sydney (4h 30m annual swing), Auckland (5h 3m annual swing), Los Angeles (4h 32m annual swing), Perth (4h 11m annual swing).
Civil-light risk
Full civil-twilight bound all year
Civil twilight uses -6°. White-night counts matter because dawn/dusk phases stop behaving like ordinary morning/evening windows.
Calculation boundaries
What this model can and cannot promise
What this model includes
Latitude, longitude, solar elevation thresholds, atmospheric-refraction sunrise/sunset convention, America/Argentina/Buenos_Aires local formatting, and a 365-day sweep for 2026.
What this model excludes
Mountains, skyline obstruction, sea horizon differences, weather, smoke, cloud cover, local legal definitions, aviation rules, and observer elevation.
When to verify elsewhere
Use official observatory, aviation, maritime, legal, or local almanac sources for high-stakes operations; this page is designed for planning, comparison, and general reference.
Why city pages differ
Two cities in America/Argentina/Buenos_Aires can still have different daylight and twilight curves because the coordinate pair, especially latitude, drives the result.
Seasonal daylight fingerprint
How daylight changes through 2026
These values are derived from the same 365-day curve: threshold counts, fastest day-to-day change, the closest 12-hour balance, and monthly daylight averages.
14h+ daylight days
68
Days at or above fourteen hours of sun.
10h-or-less days
43
Short-day entries at ten hours or below.
Fastest gain
Sep 11 (+3m from the previous day)
Fastest loss
Feb 24 (-3m from the previous day)
Closest 12-hour balance
Mar 24 at 12h (no change from 12h)
Brightest month
December average 14h 26m
Shortest month
June average 9h 52m
Year-round photographer planning
Golden & blue hour across 2026
Combined morning + evening windows, computed for every UTC day of the year.
- Longest golden hour day
- Jun 21 — 1h 52m
- Shortest non-zero golden hour day
- Sep 24 — 1h 37m
- Year-round daily average
- 1h 44m
- Longest blue hour day
- Dec 21 — 23m
- Blue-hour daily average
- 21m
- Longest civil twilight
- Dec 21 — 59m
- Civil twilight average
- 54m
- Longest astronomical night
- Jun 21 — 11h 9m
- Days with true darkness
- 365 / 365
Twilight phases reference
What each phase means
Solar elevation thresholds used on this page. All angles are measured from the true horizon at the city coordinate.
Sunrise / sunset · -0.833°
The sun's upper edge crosses the horizon. The negative value is atmospheric refraction (~34') plus the apparent solar disc radius (~16') — what almanacs call "official" sunrise/sunset.
Golden hour · 6° to -4°
Warm, low-angle light photographers and cinematographers plan around. Two windows per day — one in the morning, one in the evening.
Blue hour · -4° to -6°
Sky takes on deep, even blues; useful for cityscape photography because artificial lights and ambient sky balance.
Civil twilight · -6°
Brightest natural objects are still visible; outdoor activities don't need artificial light. Used in many legal definitions of dawn/dusk.
Nautical twilight · -12°
Horizon is just visible at sea, allowing celestial navigation; named for sailors taking sextant fixes.
Astronomical twilight · -18°
Sky is dark enough for deep-sky observation. After astronomical dusk and before astronomical dawn is when astrophotographers shoot.
Solar planning depth
What the Buenos Aires daylight curve means
This section turns the chart into readable planning context: latitude, seasonal range, monthly checkpoints, and how the curve should be used.
Solar fingerprint
Buenos Aires, Argentina is modeled at 34.60°S, 58.38°W in America/Argentina/Buenos_Aires. That coordinate pair drives every bar in the 2026 daylight curve.
Seasonal swing
The longest day is Dec 21 at 14h 29m; the shortest is Jun 17 at 9h 50m. The yearly range is 4h 39m, which makes this a moderate seasonal daylight profile.
Latitude context
Buenos Aires sits in the Southern Hemisphere mid-latitude band. Latitude is the main reason two cities in the same timezone can have very different sunrise, sunset, and day-length patterns.
Monthly anchors
Useful checkpoints in this curve: Jan 15 14h 12m, Mar 15 12h 19m, Jun 15 9h 51m, and Sep 15 11h 52m. These anchors help readers see the shape of the year without reading all 365 bars one by one.
Today and twilight
Today in Buenos Aires, sunrise is about 5:47 AM, sunset about 7:26 PM, solar noon 12:37 PM, and daylight totals 13h 38m. Civil twilight runs 5:20 AM to 7:53 PM; golden hour windows are 5:31 AM to 6:22 AM and 6:51 PM to 7:42 PM.
Golden hour planning
Today's combined morning + evening golden hour totals 1h 43m. The longest combined golden hour day of 2026 is Jun 21 — 1h 52m. The shortest non-zero day is Sep 24 — 1h 37m. Year-round average is 1h 44m per day across days where a golden-hour window exists.
Twilight ladder
Nautical twilight today: 4:48 AM to 8:25 PM. Astronomical twilight today: 4:13 AM to 9:00 PM. The single longest stretch of true astronomical darkness in 2026 occurs on Jun 21 — 11h 9m. 365 days in 2026 include at least some astronomical darkness.
Seasonal momentum
Fastest daily daylight gain: Sep 11 (+3m from the previous day). Fastest daily daylight loss: Feb 24 (-3m from the previous day). Closest 12-hour balance: Mar 24 at 12h (no change from 12h). Average-month anchors: December average 14h 26m is brightest, while June average 9h 52m is shortest. 68 days reach 14h+ daylight; 43 days stay at 10h or less.
Blue and civil light
Today's combined blue hour totals 21m. The longest combined blue-hour day is Dec 21 — 23m. Blue-hour average is 21m per usable day. The longest civil-twilight-only day is Dec 21 — 59m. Civil twilight averages 54m where both dawn and dusk edges exist.
Sunrise and sunset are approximations for planning and comparison. For legal, aviation, photography, or scientific use, verify with a local almanac or official observatory source.
Frequently asked questions
Buenos Aires sun questions
- When is golden hour in Buenos Aires?
- Today, the evening golden hour in Buenos Aires runs 6:51 PM to 7:42 PM; the morning window is 5:31 AM to 6:22 AM. Combined total today is 1h 43m. Across 2026, the longest combined golden-hour day is Jun 21 — 1h 52m.
- When does civil twilight start and end in Buenos Aires?
- Civil twilight in Buenos Aires today runs 5:20 AM to 7:53 PM. It's the period when the sun is between -0.833° and -6° elevation; the brightest stars become visible at the dusk boundary.
- What is the longest astronomical-night day of the year in Buenos Aires?
- Buenos Aires's longest stretch of true astronomical darkness in 2026 is Jun 21 — 11h 9m. Astronomical twilight ends when the sun reaches -18° elevation; only beyond that do deep-sky targets become observable.
- Are there white nights in Buenos Aires?
- No. Buenos Aires's latitude produces a full civil/nautical/astronomical twilight ladder on every day of 2026.
Comparable daylight curves
These are selected by latitude and annual daylight swing, not by the generic city list, so the comparison is tied to Buenos Aires's actual solar profile.