Rule
Dark Skies
St. Moritz - Dark Skies - Alps
Saint Moritz, Canton Grisons, 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
St. Moritz
Fri, Feb 20 · 21:00–22:00 · 1h window
Low confidence
38%
🌛Moon Altitude6.7°
☁️Total Cloud Coverage17.1%
Good Dark Skies
St. Moritz
Fri, Feb 20 · 23:00–01:00
🌛Moon Altitude:-20.1--12°
Low
Dark Skies
St. Moritz
Sat, Feb 21 · 01:00–02:00
🌛Moon Altitude:-26.8°
Medium
Excellent Dark Skies (pristine)
St. Moritz
Tue, Feb 24 · 04:00–05:00
🌛Moon Altitude:-13.8°
Low
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 95 hours
OR 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, Feb 15 | ||||||
| 02:00 | ✓ | 99% | 757m | 0% | 4.2% | -45° |
| 03:00 | ✓ | 98% | 708m | 0% | 4.2% | -35° |
| 04:00 | ✓ | 99% | 834m | 0% | 4.2% | -25° |
| 05:00 | ✓ | 100% | 805m | 0% | 4.2% | -15° |
| 06:00 | ✕ | 100% | 787m | 0% | 4.2% | -5.6° |
| 07:00 | ✕ | 100% | 2057m | 0% | 4.2% | 2.8° |
| 08:00 | ✕ | 100% | 2216m | 0% | 4.2% | 10° |
| 09:00 | ✕ | 100% | 1223m | 0% | 4.2% | 16° |
| 10:00 | ✕ | 100% | 5780m | 0% | 4.2% | 19° |
| 11:00 | ✕ | 94% | 12864m | 0% | 4.2% | 21° |
| 12:00 | ✕ | 37% | 22093m | 0% | 4.2% | 20° |
| 13:00 | ✕ | 5% | 24134m | 0% | 4.2% | 16° |
| 14:00 | ✕ | 2.2% | 24135m | 5.3% | 4.2% | 11° |
| 15:00 | ✕ | 5.4% | 24135m | 11% | 4.2% | 3.5° |
| 16:00 | ✕ | 7.1% | 24135m | 16% | 4.2% | -4.8° |
| 17:00 | ✕ | 100% | 24134m | 43% | 4.2% | -14° |
| 18:00 | ✕ | 100% | 24134m | 70% | 4.2% | -23° |
| 19:00 | ✓ | 100% | 24134m | 96% | 4.2% | -33° |
| 20:00 | ✓ | 100% | 24134m | 88% | 4.2% | -43° |
| 21:00 | ✓ | 100% | 24134m | 83% | 4.2% | -52° |
| 22:00 | ✓ | 100% | 22340m | 78% | 4.2% | -60° |
| 23:00 | ✓ | 100% | 2405m | 84% | 4.2% | -64° |
| Mon, Feb 16 | ||||||
| 24:00 | ✓ | 100% | 820m | 90% | 4.2% | -63° |
| 01:00 | ✓ | 100% | 24134m | 97% | 1.2% | -58° |
| 02:00 | ✓ | 93% | 24134m | 98% | 1.2% | -50° |
| 03:00 | ✓ | 100% | 23238m | 99% | 1.2% | -40° |
| 04:00 | ✓ | 100% | 5760m | 100% | 1.2% | -30° |
| 05:00 | ✓ | 99% | 17682m | 100% | 1.2% | -20° |
| 06:00 | ✕ | 100% | 170m | 100% | 1.2% | -10° |
| 07:00 | ✕ | 100% | 217m | 100% | 1.2% | -0.77° |
| 08:00 | ✕ | 100% | 189m | 92% | 1.2% | 7.7° |
| 09:00 | ✕ | 100% | 99m | 84% | 1.2% | 15° |
| 10:00 | ✕ | 100% | 80m | 76% | 1.2% | 21° |
| 11:00 | ✕ | 100% | 172m | 84% | 1.2% | 24° |
| 12:00 | ✕ | 90% | 2505m | 91% | 1.2% | 25° |
| 13:00 | ✕ | 27% | 2785m | 98% | 1.2% | 24° |
| 14:00 | ✕ | 18% | 24134m | 99% | 1.2% | 19° |
| 15:00 | ✕ | 95% | 18448m | 99% | 1.2% | 13° |
| 16:00 | ✕ | 57% | 13165m | 99% | 1.2% | 5.8° |
| 17:00 | ✕ | 100% | 13998m | 99% | 1.2% | -2.9° |
| 18:00 | ✕ | 100% | 518m | 100% | 1.2% | -12° |
| 19:00 | ✓ | 100% | 181m | 100% | 1.2% | -22° |
| 20:00 | ✓ | 39% | 11054m | 94% | 1.2% | -32° |
| 21:00 | ✓ | 67% | 14117m | 89% | 1.2% | -41° |
| 22:00 | ✓ | 73% | 1694m | 84% | 1.2% | -50° |
| 23:00 | ✓ | 76% | 353m | 89% | 1.2% | -56° |
| Tue, Feb 17 | ||||||
| 24:00 | ✓ | 91% | 432m | 95% | 1.2% | -59° |
| 01:00 | ✓ | 96% | 758m | 100% | 0% | -58° |
| 02:00 | ✓ | 100% | 130m | 99% | 0% | -52° |
| 03:00 | ✓ | 87% | 381m | 98% | 0% | -44° |
| 04:00 | ✓ | 100% | 2393m | 97% | 0% | -34° |
| 05:00 | ✓ | 100% | 113m | 97% | 0% | -24° |
| 06:00 | ✕ | 93% | 832m | 97% | 0% | -14° |
| 07:00 | ✕ | 100% | 127m | 97% | 0% | -4.3° |
| 08:00 | ✕ | 90% | 2095m | 97% | 0% | 5.2° |
| 09:00 | ✕ | 97% | 1255m | 97% | 0% | 14° |
| 10:00 | ✕ | 100% | 358m | 97% | 0% | 21° |
| 11:00 | ✕ | 100% | 271m | 98% | 0% | 27° |
| 12:00 | ✕ | 100% | 204m | 98% | 0% | 30° |
| 13:00 | ✕ | 100% | 795m | 99% | 0% | 30° |
| 14:00 | ✕ | 100% | 1527m | 82% | 0% | 28° |
| 15:00 | ✕ | 100% | 4953m | 66% | 0% | 23° |
| 16:00 | ✕ | 100% | 4890m | 49% | 0% | 17° |
| 17:00 | ✕ | 100% | 2089m | 52% | 0% | 8.3° |
| 18:00 | ✕ | 78% | 13985m | 54% | 0% | -0.76° |
| 19:00 | ✓ | 73% | 13904m | 56% | 0% | -10° |
| 20:00 | ✓ | 52% | 13939m | 41% | 0% | -20° |
| 21:00 | ✓ | 43% | 16481m | 25% | 0% | -30° |
| 22:00 | ✓ | 73% | 24135m | 9.3% | 0% | -39° |
| 23:00 | ✓ | 89% | 23474m | 6.2% | 0% | -46° |
| Wed, Feb 18 | ||||||
| 24:00 | ✓ | 88% | 24134m | 3.1% | 0% | -52° |
| 01:00 | ✓ | 67% | 23694m | 0% | 1.2% | -53° |
| 02:00 | ✓ | 26% | 22760m | 0% | 1.2% | -51° |
| 03:00 | ✓ | 49% | 15821m | 0% | 1.2% | -45° |
| 04:00 | ✓ | 94% | 3597m | 0% | 1.2% | -37° |
| 05:00 | ✓ | 97% | 302m | 0% | 1.2% | -28° |
| 06:00 | ✕ | 92% | 186m | 0% | 1.2% | -18° |
| 07:00 | ✕ | 98% | 241m | 0% | 1.2% | -7.6° |
| 08:00 | ✕ | 96% | 8206m | 0% | 1.2% | 2.5° |
| 09:00 | ✕ | 95% | 16171m | 0% | 1.2% | 12° |
| 10:00 | ✕ | 93% | 24135m | 0% | 1.2% | 21° |
| 11:00 | ✕ | 96% | 24135m | 0% | 1.2% | 28° |
| 12:00 | ✕ | 98% | 24135m | 0% | 1.2% | 34° |
| 13:00 | ✕ | 100% | 24135m | 0% | 1.2% | 37° |
| 14:00 | ✕ | 100% | 20419m | 0% | 1.2% | 36° |
| 15:00 | ✕ | 100% | 16704m | 0% | 1.2% | 33° |
| 16:00 | ✕ | 100% | 12988m | 0% | 1.2% | 27° |
| 17:00 | ✕ | 100% | 9937m | 7.4% | 1.2% | 20° |
| 18:00 | ✕ | 100% | 6886m | 15% | 1.2% | 11° |
| 19:00 | ✓ | 100% | 3835m | 22% | 1.2% | 1.6° |
| 20:00 | ✓ | 100% | 5378m | 29% | 1.2% | -8.2° |
| 21:00 | ✓ | 100% | 6921m | 36% | 1.2% | -18° |
| 22:00 | ✓ | 100% | 8464m | 42% | 1.2% | -27° |
| 23:00 | ✓ | 100% | 6939m | 47% | 1.2% | -35° |
| Thu, Feb 19 | ||||||
| 24:00 | ✓ | 100% | 5414m | 51% | 1.2% | -42° |
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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