Coordinate model
Reykjavík is computed at 64.15°N, 21.94°W in Atlantic/Reykjavik. The coordinate, not the country or timezone alone, controls the curve.
Weekly digest
Pick the categories you care about: movies, AI launches, sports, eclipses, and major public dates. One email per week, and never anything you did not ask for.
Want full preferences? Customize your digest →
Daylight curve
64.15°N · 21.94°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
21.1h
2026-06-20
Shortest day
4.1h
2026-12-20
Average
12.5h
Δ extreme
Today's solar window
Sunrise
3:08 AM
Solar noon
1:26 PM
Sunset
11:44 PM
Day length
20h 36m
Civil twilight (-6°)
— to —
Nautical twilight (-12°)
Sun never reaches -12° today
Astronomical twilight (-18°)
Sun never reaches -18° today
Golden hour
— · —
Blue hour
— · —
Seasonal checkpoints
March equinox
Mar 20
12h 15m
June solstice
Jun 21
21h 9m
September equinox
Sep 22
12h 19m
December solstice
Dec 21
4h 7m
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 Reykjavík's coordinates, local timezone, annual daylight spread, twilight availability, and peer-city curve rather than a reusable sunrise template.
Reykjavík is computed at 64.15°N, 21.94°W in Atlantic/Reykjavik. The coordinate, not the country or timezone alone, controls the curve.
17h 2m between Dec 20 (4h 7m) and Jun 20 (21h 9m).
Today resolves to sunrise 3:08 AM, solar noon 1:26 PM, and sunset 11:44 PM.
no usable golden-hour window today; no usable blue-hour window today; longest golden-hour day Jan 21 — 7h 1m
220 days include astronomical darkness; 65 civil white-night days and 145 astronomical white-night days are modeled in 2026.
Anchorage (13h 55m swing); Stockholm (12h 32m swing); Tromsø (24h swing); Moscow (10h 33m swing); Ushuaia (10h 8m 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/reykjavik/ resolves to Reykjavík, Iceland; the route is generated only from the retained SUN_CITIES list.
64.15°N, 21.94°W; latitude band high-mid latitude band; Northern Hemisphere.
Atlantic/Reykjavik 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 Jun 20 (21h 9m), shortest Dec 20 (4h 7m), average 12h 31m.
Fastest gain Jan 28 (+7m from the previous day); fastest loss Jul 22 (-7m from the previous day); closest 12-hour day Sep 25 at 11h 59m (-1m from 12h).
Today: sunrise 3:08 AM, solar noon 1:26 PM, sunset 11:44 PM.
Golden Jan 21 — 7h 1m; blue May 19 — 2h 52m; civil May 19 — 4h 51m; astronomical night Dec 21 — 12h 56m.
220 days with astronomical darkness; 65 civil white-night days; 145 astronomical white-night days.
March equinox: 12h 15m; June solstice: 21h 9m; September equinox: 12h 19m; December solstice: 4h 7m
Anchorage (13h 55m); Stockholm (12h 32m); Tromsø (24h); Moscow (10h 33m); Ushuaia (10h 8m)
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
No standard golden-hour window today
Best annual golden-hour day: Jan 21 — 7h 1m. Blue-hour window is absent or unbounded today.
Astronomy
220 true-darkness days
Longest astronomical-night entry: Dec 21 — 12h 56m. Use local cloud cover and moon phase separately.
Outdoor routine
20h 36m daylight today
Sunrise 3:08 AM and sunset 11:44 PM are the practical day-boundaries for school runs, work windows, and outdoor activity.
Seasonal planning
17h 2m annual swing
June average 20h 51m; December average 4h 22m. This is the year-scale gap to check before travel or outdoor scheduling.
Travel comparison
10 retained peer curves
Reykjavík's closest daylight-pattern peers here include Anchorage (13h 55m annual swing), Stockholm (12h 32m annual swing), Tromsø (24h annual swing), Moscow (10h 33m annual swing).
Civil-light risk
65 civil white-night days
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, Atlantic/Reykjavik 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 Atlantic/Reykjavik 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
154
Days at or above fourteen hours of sun.
10h-or-less days
137
Short-day entries at ten hours or below.
Fastest gain
Jan 28 (+7m from the previous day)
Fastest loss
Jul 22 (-7m from the previous day)
Closest 12-hour balance
Sep 25 at 11h 59m (-1m from 12h)
Brightest month
June average 20h 51m
Shortest month
December average 4h 22m
Year-round photographer planning
Combined morning + evening windows, computed for every UTC day of the year.
White-night counts
65 days without civil-twilight bound, 111 without nautical-twilight bound, 145 without astronomical-twilight bound. On those days the sun never gets low enough for the named phase to occur, so true darkness disappears for that stretch.
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 Reykjavík'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 Reykjavík's actual solar profile.