Iceland · 64.15°N 21.94°W · 61 m
Stargazing in Reykjavík
Aurora from the edge of town, but only between September and April.
- Sky quality
- Bortle 7 — suburban/urban transition
- Clear nights a year
- ≈ 25
- Best month overall
- December
- Milky Way core
- Never above 10°
The Milky Way is invisible. Bright planets, the Moon, the ISS and bright stars remain easy.
Key facts
- Sky quality
- Bortle 7 — suburban/urban transitionBortle class 7
- Average clear nights
- 25 per yearNights averaging under 30% cloud, 10-year ERA5 record
- Best Milky Way season
- Core never rises usefully
- Darkness quality
- Poor12.5 h of astronomical darkness at its darkest, in December
- Typical cloud cover in July
- 79%4% of nights come in under 30% cloud
- Best month for astrophotography
- DecemberAbout 2.3 dark, moon-free, statistically clear nights
- Coordinates
- 64.1466, -21.942661 m elevation · Atlantic/Reykjavik
Questions answered on this page
- Is tonight good for stargazing in Reykjavík?
- Is the Milky Way visible from Reykjavík?
- How many clear nights does Reykjavík get each year?
- What is the best month for astrophotography in Reykjavík?
- How many hours of true darkness does Reykjavík get each month?
- How dark is the sky in Reykjavík on the Bortle scale?
- When is the Milky Way core above the horizon from Reykjavík?
- Should I drive somewhere darker than Reykjavík?
At 64° north Reykjavík loses astronomical darkness entirely from late April to late August. The compensation is the other half of the year: by October there are more than nine hours of true darkness a night and the auroral oval sits directly overhead during geomagnetic activity.
Iceland's weather is the constant. Cloud cover averages high year-round and moves fast, so the successful strategy is mobility — Þingvellir, Grótta lighthouse in the city, and the south coast all sit under different weather within a ninety-minute drive.
If the sky here is too bright: Þingvellir National Park, 45 km east — Bortle 4 and a common cloud escape.
Evergreen intelligence
The four questions people ask about Reykjavík
Computed from 10 years of ERA5 reanalysis at these coordinates and a full year of Sun and Moon geometry — not copied from anywhere.
- How many clear nights does Reykjavík have?
- About 25 nights a year average less than 30% cloud cover, based on 10 years of ERA5 daily reanalysis at 64.15, -21.94. The clearest month is December at 10% of nights; when you also require darkness and no Moon, roughly 10 nights a year are genuinely usable for faint targets.
- What is the best month for the Milky Way in Reykjavík?
- The galactic centre never rises more than 10° above the horizon from this latitude during astronomical darkness, so the core is not a realistic target here. The outer arms of the Milky Way are still visible on dark winter nights.
- When is it darkest in Reykjavík?
- December gives the most true darkness — an average of 12.5 hours a night with the Sun more than 18° below the horizon. At the other end, May, June, July, August have effectively no astronomical darkness at all: the Sun never drops far enough, so faint-target work is impossible regardless of the forecast.
- When should I plan an astrophotography trip to Reykjavík?
- December offers the most nights that are simultaneously dark, moon-free and statistically clear — about 2.3 of them. Book around the new Moon in that month and keep two spare nights; a single fixed date at any location is a coin toss.
Darkness calendar
Reykjavík month by month
Astronomical darkness and Moon geometry are computed for these coordinates. Cloud figures are ten-year ERA5 daily means. Rating combines darkness, moon-free nights and clear-sky odds.
| Month | Astro darkness | Moon-free dark nights | Avg cloud | Clear nights | Milky Way core | Rating |
|---|---|---|---|---|---|---|
| Jan | 12.0 h | 20 | 77% | 8% | — | Poor |
| Feb | 9.8 h | 18 | 80% | 5% | — | Poor |
| Mar | 6.3 h | 16 | 76% | 9% | — | Poor |
| Apr | 0.6 h | 1 | 77% | 8% | — | Off-season |
| May | None | 0 | 77% | 8% | — | Off-season |
| Jun | None | 0 | 81% | 4% | — | Off-season |
| Jul | None | 0 | 79% | 4% | — | Off-season |
| Aug | None | 0 | 76% | 5% | — | Off-season |
| Sep | 4.0 h | 15 | 76% | 4% | — | Off-season |
| Oct | 8.7 h | 17 | 77% | 7% | — | Poor |
| Nov | 11.4 h | 21 | 75% | 9% | — | Poor |
| Dec | 12.5 h | 23 | 74% | 10% | — | Poor |
"Moon-free dark nights" counts nights with at least two hours of astronomical darkness during which the Moon stays below the horizon. "Clear nights" is the share of days in the ERA5 record averaging under 30% cloud cover.
Practical
What Reykjavík is actually good for
- Aurora, September to April
- Long winter nights
- Coastal foregrounds
For a decision on a specific night rather than a season, the SnapCosmos Night Engine scores tonight and the next six nights from these coordinates — . The method, weighting and known limits are documented on the Night Engine page, and its measured accuracy is published here.
FAQ
Common questions about the sky in Reykjavík
- Can you see the Milky Way in Reykjavík?
- Not from Reykjavík itself — the sky there is bortle 7 — suburban/urban transition, which washes the Milky Way out completely. Þingvellir National Park, 45 km east — Bortle 4 and a common cloud escape.
- When is the best time of year to stargaze in Reykjavík?
- It depends on what you want to see, and the month-by-month table on this page ranks every month by hours of astronomical darkness, moon-free nights and ten years of cloud statistics for these exact coordinates.
- How dark does it get in Reykjavík?
- Reykjavík is at latitude 64.1°N, and this page computes the hours of true astronomical darkness — Sun more than 18° below the horizon — for every month of the year at that latitude.
- Is tonight a good night in Reykjavík?
- The SnapCosmos Night Engine scores tonight for these coordinates against the coming week using live cloud forecasts, Moon geometry and darkness, and returns a single go, wait or skip recommendation.
Where these numbers come from
- Ten-year cloud-cover climatology and historical night rankingERA5 reanalysisECMWF / Copernicus Climate Change Service
- Hourly cloud cover, precipitation, humidity and visibility forecastsOpen-Meteo forecast and archive APIOpen-Meteo
- Sun, Moon and planet positions, rise and set times, twilight phasesAstronomy Engine (VSOP87 / ELP2000 series)Don Cross, after the IMCCE and JPL analytical theories
- Bortle class and sky-brightness context for each locationWorld Atlas of Artificial Night Sky Brightness (Falchi et al., 2016)Science Advances / Light Pollution Map
- Definitions of civil, nautical and astronomical twilight, and lunar phase conventionsAstronomical Applications DepartmentUnited States Naval Observatory
Figures on this page last recomputed .
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