Coordinate model
São Paulo is computed at 23.55°S, 46.63°W in America/Sao_Paulo. The coordinate, not the country or timezone alone, controls the curve.
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Daylight curve
23.55°S · 46.63°W. Each vertical bar is one day of the year — bar height shows total daylight minutes.
Last updated recently. Daylight values are generated from the city coordinates and solar-position math during the page revalidation window.
Longest day
13.6h
2026-12-15
Shortest day
10.7h
2026-06-15
Average
12.1h
Δ seasonal
Today's solar window
Sunrise
6:43 AM
Solar noon
12:05 PM
Sunset
5:27 PM
Day length
10h 44m
Civil twilight (-6°)
6:19 AM to 5:51 PM
Nautical twilight (-12°)
5:50 AM to 6:19 PM
Astronomical twilight (-18°)
5:23 AM to 6:47 PM
Golden hour1h 37m total
6:28 AM to 7:16 AM · 4:53 PM to 5:42 PM
Blue hour19m total
6:19 AM to 6:28 AM · 5:42 PM to 5:51 PM
Seasonal checkpoints
March equinox
Mar 20
12h 7m
June solstice
Jun 21
10h 41m
September equinox
Sep 22
12h 7m
December solstice
Dec 21
13h 35m
Full-year edge cases: 0 polar-day entries and 0 polar-night entries in the 2026 curve.
City solar dossier
These rows bind the page to São Paulo's coordinates, local timezone, annual daylight spread, twilight availability, and peer-city curve rather than a reusable sunrise template.
São Paulo is computed at 23.55°S, 46.63°W in America/Sao_Paulo. The coordinate, not the country or timezone alone, controls the curve.
2h 54m between Jun 15 (10h 41m) and Dec 15 (13h 35m).
Today resolves to sunrise 6:43 AM, solar noon 12:05 PM, and sunset 5:27 PM.
golden hour today 1h 37m; blue hour today 19m; longest golden-hour day Jun 21 — 1h 37m
365 days include astronomical darkness; 0 civil white-night days and 0 astronomical white-night days are modeled in 2026.
Johannesburg (3h 17m swing); Hong Kong (2h 44m swing); Dubai (3h 8m swing); Mexico City (2h 21m swing); Mumbai (2h 18m swing)
Solar evidence pack
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.
/sun/sao-paulo/ resolves to São Paulo, Brazil; the route is generated only from the retained SUN_CITIES list.
23.55°S, 46.63°W; latitude band mid-latitude band; Southern Hemisphere.
America/Sao_Paulo is used to anchor today's local sunrise, sunset, solar noon, and twilight windows.
365 daily daylight rows were computed for 2026; expected 365.
Longest Dec 15 (13h 35m), shortest Jun 15 (10h 41m), average 12h 6m.
Fastest gain Aug 13 (+2m from the previous day); fastest loss Feb 5 (-2m from the previous day); closest 12-hour day Sep 17 at 12h (no change from 12h).
Today: sunrise 6:43 AM, solar noon 12:05 PM, sunset 5:27 PM.
Golden Jun 21 — 1h 37m; blue Dec 21 — 20m; civil Dec 21 — 51m; astronomical night Jun 21 — 10h 38m.
365 days with astronomical darkness; 0 civil white-night days; 0 astronomical white-night days.
March equinox: 12h 7m; June solstice: 10h 41m; September equinox: 12h 7m; December solstice: 13h 35m
Johannesburg (3h 17m); Hong Kong (2h 44m); Dubai (3h 8m); Mexico City (2h 21m); Mumbai (2h 18m)
Solar 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
Photography
1h 37m golden hour today
Best annual golden-hour day: Jun 21 — 1h 37m. Blue-hour total today: 19m.
Astronomy
365 true-darkness days
Longest astronomical-night entry: Jun 21 — 10h 38m. Use local cloud cover and moon phase separately.
Outdoor routine
10h 44m daylight today
Sunrise 6:43 AM and sunset 5:27 PM are the practical day-boundaries for school runs, work windows, and outdoor activity.
Seasonal planning
2h 54m annual swing
December average 13h 33m; June average 10h 42m. This is the year-scale gap to check before travel or outdoor scheduling.
Travel comparison
10 retained peer curves
São Paulo's closest daylight-pattern peers here include Johannesburg (3h 17m annual swing), Hong Kong (2h 44m annual swing), Dubai (3h 8m annual swing), Mexico City (2h 21m 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 includes
Latitude, longitude, solar elevation thresholds, atmospheric-refraction sunrise/sunset convention, America/Sao_Paulo 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/Sao_Paulo can still have different daylight and twilight curves because the coordinate pair, especially latitude, drives the result.
Seasonal daylight fingerprint
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
0
Days at or above fourteen hours of sun.
10h-or-less days
0
Short-day entries at ten hours or below.
Fastest gain
Aug 13 (+2m from the previous day)
Fastest loss
Feb 5 (-2m from the previous day)
Closest 12-hour balance
Sep 17 at 12h (no change from 12h)
Brightest month
December average 13h 33m
Shortest month
June average 10h 42m
Year-round photographer planning
Combined morning + evening windows, computed for every UTC day of the year.
Twilight phases reference
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
Reference fields include São Paulo's route, coordinates, timezone, daylight extremes, twilight windows, white-night counts, peer curves, evidence checks, and calculation boundaries.
Frequently asked questions
These are selected by latitude and annual daylight swing, not by the generic city list, so the comparison is tied to São Paulo's actual solar profile.