Rule
Dark Skies
Lauterbrunnen - Dark Skies - Alps
Lauterbrunnen, Bern, Switzerland
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/Zurich
Next opportunity
Good Dark Skies
Lauterbrunnen
Tomorrow · 01:00–02:00 · 1h window
Medium confidence
63%
🌛Moon Altitude-13.7°
☁️Total Cloud Coverage11.5%
Pristine Dark Skies (pristine)
Lauterbrunnen
Thu, Jun 18 · 24:15–02:43
🌛Moon Altitude:-15.4--0.7°
Medium
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72-hour requirements breakdown
What passed or failed, hour by hourOR logic: one branch per group is enough
Meets requirement
Misses requirement
Time Europe/Zurich | Astronomical Night Any | Total Cloud Coverage ≤ 20.0% | Visibility ≥ 12000.0m | Precipitation Chance ≤ 10.0% | Moon Illumination OR1·B1≤ 35.0% | Moon Altitude OR1·B2≤ 10.0° |
|---|---|---|---|---|---|---|
| Sun, Jun 14 | ||||||
| 06:00 | ✕ | 54% | 24134m | 0% | 0.7% | 15° |
| 07:00 | ✕ | 84% | 24134m | 0% | 0.7% | 24° |
| 08:00 | ✕ | 50% | 24135m | 0% | 0.7% | 34° |
| 09:00 | ✕ | 40% | 13795m | 13% | 0.7% | 44° |
| 10:00 | ✕ | 55% | 13793m | 26% | 0.7% | 54° |
| 11:00 | ✕ | 43% | 13793m | 39% | 0.7% | 62° |
| 12:00 | ✕ | 31% | 13793m | 47% | 0.7% | 69° |
| 13:00 | ✕ | 23% | 13792m | 56% | 0.7% | 71° |
| 14:00 | ✕ | 23% | 13792m | 64% | 0.7% | 66° |
| 15:00 | ✕ | 23% | 13792m | 43% | 0.7% | 58° |
| 16:00 | ✕ | 23% | 13793m | 21% | 0.7% | 49° |
| 17:00 | ✕ | 28% | 13796m | 0% | 0.7% | 39° |
| 18:00 | ✕ | 23% | 13799m | 0% | 0.7% | 29° |
| 19:00 | ✕ | 23% | 13808m | 0% | 0.7% | 20° |
| 20:00 | ✕ | 21% | 13823m | 0% | 0.7% | 11° |
| 21:00 | ✕ | 16% | 13938m | 0% | 0.7% | 2.8° |
| 22:00 | ✕ | 7.6% | 24135m | 0% | 0.7% | -4.2° |
| 23:00 | ✕ | 0% | 24135m | 0% | 0.7% | -9.8° |
| Mon, Jun 15 | ||||||
| 24:00 | ✓ | 0% | 24135m | 0% | 0.7% | -14° |
| 01:00 | ✓ | 0% | 24134m | 0% | 0.7% | -15° |
| 02:00 | ✓ | 0.5% | 24134m | 0% | 0.1% | -15° |
| 03:00 | ✕ | 1.5% | 24135m | 0% | 0.1% | -12° |
| 04:00 | ✕ | 2.5% | 24134m | 0% | 0.1% | -7.6° |
| 05:00 | ✕ | 4.3% | 24135m | 0% | 0.1% | -1.4° |
| 06:00 | ✕ | 9% | 24134m | 0% | 0.1% | 6.1° |
| 07:00 | ✕ | 5% | 24134m | 0% | 0.1% | 15° |
| 08:00 | ✕ | 5% | 24134m | 0% | 0.1% | 24° |
| 09:00 | ✕ | 5% | 24134m | 13% | 0.1% | 33° |
| 10:00 | ✕ | 5% | 24135m | 26% | 0.1% | 43° |
| 11:00 | ✕ | 27% | 13860m | 39% | 0.1% | 53° |
| 12:00 | ✕ | 39% | 13800m | 39% | 0.1% | 62° |
| 13:00 | ✕ | 42% | 13793m | 39% | 0.1% | 69° |
| 14:00 | ✕ | 51% | 13794m | 39% | 0.1% | 71° |
| 15:00 | ✕ | 51% | 13793m | 26% | 0.1% | 67° |
| 16:00 | ✕ | 44% | 13792m | 13% | 0.1% | 60° |
| 17:00 | ✕ | 41% | 13794m | 0% | 0.1% | 50° |
| 18:00 | ✕ | 39% | 13796m | 0% | 0.1% | 41° |
| 19:00 | ✕ | 29% | 13799m | 0% | 0.1% | 31° |
| 20:00 | ✕ | 21% | 13798m | 0% | 0.1% | 21° |
| 21:00 | ✕ | 23% | 13811m | 0% | 0.1% | 12° |
| 22:00 | ✕ | 23% | 13826m | 0% | 0.1% | 3.7° |
| 23:00 | ✕ | 25% | 13835m | 0% | 0.1% | -3.6° |
| Tue, Jun 16 | ||||||
| 24:00 | ✓ | 25% | 13987m | 0% | 0.1% | -9.5° |
| 01:00 | ✓ | 12% | 24134m | 0% | 0.1% | -14° |
| 02:00 | ✓ | 74% | 24134m | 0% | 2.6% | -16° |
| 03:00 | ✕ | 17% | 24135m | 0% | 2.6% | -16° |
| 04:00 | ✕ | 8% | 24134m | 0% | 2.6% | -13° |
| 05:00 | ✕ | 5% | 24135m | 0% | 2.6% | -9.1° |
| 06:00 | ✕ | 33% | 24135m | 13% | 2.6% | -3.1° |
| 07:00 | ✕ | 100% | 24135m | 26% | 2.6% | 4.3° |
| 08:00 | ✕ | 100% | 24135m | 39% | 2.6% | 13° |
| 09:00 | ✕ | 100% | 24134m | 56% | 2.6% | 22° |
| 10:00 | ✕ | 99% | 13882m | 73% | 2.6% | 31° |
| 11:00 | ✕ | 77% | 13794m | 90% | 2.6% | 41° |
| 12:00 | ✕ | 26% | 13792m | 93% | 2.6% | 51° |
| 13:00 | ✕ | 23% | 13792m | 96% | 2.6% | 60° |
| 14:00 | ✕ | 33% | 13792m | 99% | 2.6% | 67° |
| 15:00 | ✕ | 51% | 13792m | 78% | 2.6% | 70° |
| 16:00 | ✕ | 50% | 11179m | 58% | 2.6% | 66° |
| 17:00 | ✕ | 85% | 3693m | 38% | 2.6% | 59° |
| 18:00 | ✕ | 44% | 13802m | 34% | 2.6% | 50° |
| 19:00 | ✕ | 28% | 13796m | 31% | 2.6% | 40° |
| 20:00 | ✕ | 23% | 13796m | 28% | 2.6% | 30° |
| 21:00 | ✕ | 88% | 13813m | 19% | 2.6% | 21° |
| 22:00 | ✕ | 40% | 24135m | 9.4% | 2.6% | 11° |
| 23:00 | ✕ | 90% | 24134m | 0% | 2.6% | 2.5° |
| Wed, Jun 17 | ||||||
| 24:00 | ✓ | 52% | 24135m | 0% | 2.6% | -5.1° |
| 01:00 | ✓ | 98% | 24135m | 0% | 2.6% | -11° |
| 02:00 | ✓ | 23% | 24135m | 0% | 7.8% | -16° |
| 03:00 | ✕ | 7.3% | 24134m | 13% | 7.8% | -19° |
| 04:00 | ✕ | 4.8% | 24134m | 26% | 7.8% | -19° |
| 05:00 | ✕ | 4.3% | 24135m | 39% | 7.8% | -17° |
| 06:00 | ✕ | 5% | 24134m | 49% | 7.8% | -12° |
| 07:00 | ✕ | 11% | 24134m | 59% | 7.8% | -6.1° |
| 08:00 | ✕ | 53% | 24134m | 69% | 7.8% | 1.3° |
| 09:00 | ✕ | 48% | 18006m | 72% | 7.8% | 9.8° |
| 10:00 | ✕ | 43% | 11879m | 75% | 7.8% | 19° |
| 11:00 | ✕ | 38% | 5751m | 79% | 7.8% | 29° |
| 12:00 | ✕ | 34% | 8438m | 83% | 7.8% | 38° |
| 13:00 | ✕ | 30% | 11124m | 86% | 7.8% | 48° |
| 14:00 | ✕ | 26% | 13811m | 90% | 7.8% | 57° |
| 15:00 | ✕ | 17% | 17252m | 69% | 7.8% | 63° |
| 16:00 | ✕ | 8.8% | 20694m | 48% | 7.8% | 66° |
| 17:00 | ✕ | 0.3% | 24135m | 26% | 7.8% | 63° |
| 18:00 | ✕ | 1.9% | 24135m | 34% | 7.8% | 56° |
| 19:00 | ✕ | 3.4% | 24135m | 42% | 7.8% | 47° |
| 20:00 | ✕ | 5% | 24135m | 50% | 7.8% | 38° |
| 21:00 | ✕ | 5% | 24135m | 33% | 7.8% | 28° |
| 22:00 | ✕ | 5% | 24135m | 17% | 7.8% | 18° |
| 23:00 | ✕ | 5% | 24135m | 0% | 7.8% | 8.2° |
| Thu, Jun 18 | ||||||
| 24:00 | ✓ | 3.3% | 24135m | 0% | 7.8% | -0.74° |
| 01:00 | ✓ | 1.7% | 24135m | 0% | 7.8% | -8.7° |
| 02:00 | ✓ | 0% | 24135m | 0% | 16% | -15° |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity). For OR groups, only one branch is required, so some OR-branch predicates can be ✕ even in a matching hour.
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