Rule
Dark Skies
Whitehorse - Dark Skies - Yukon
Whitehorse, Yukon, Canada
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in America/Whitehorse
Next opportunity
Good Dark Skies
Whitehorse
Sat, Apr 11 · 24:18–01:00 · 1h window
Medium confidence
52%
🌛Moon Altitude-41.4°
☁️Total Cloud Coverage15.8%
Pristine Dark Skies (pristine)
Whitehorse
Sun, Apr 12 · 24:24–03:00
🌛Moon Altitude:-41.7--29.5°
Low
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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 America/Whitehorse | 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° |
|---|---|---|---|---|---|---|
| Tue, Apr 7 | ||||||
| 22:00 | ✕ | 100% | 604m | 0% | 66% | -43° |
| 23:00 | ✕ | 70% | 2042m | 0% | 66% | -37° |
| Wed, Apr 8 | ||||||
| 24:00 | ✓ | 97% | 849m | 0% | 66% | -30° |
| 01:00 | ✓ | 82% | 3135m | 0% | 66% | -23° |
| 02:00 | ✓ | 75% | 3862m | 0% | 66% | -16° |
| 03:00 | ✓ | 58% | 9503m | 0% | 66% | -10° |
| 04:00 | ✓ | 50% | 14308m | 0% | 66% | -5.5° |
| 05:00 | ✕ | 54% | 16689m | 0% | 66% | -1.9° |
| 06:00 | ✕ | 65% | 13472m | 0% | 66% | 0.36° |
| 07:00 | ✕ | 64% | 13134m | 0% | 66% | 1.1° |
| 08:00 | ✕ | 40% | 14578m | 0% | 66% | 0.25° |
| 09:00 | ✕ | 100% | 23082m | 0% | 66% | -2.1° |
| 10:00 | ✕ | 100% | 24133m | 0% | 66% | -5.8° |
| 11:00 | ✕ | 100% | 24135m | 0% | 66% | -11° |
| 12:00 | ✕ | 100% | 24135m | 0% | 66% | -17° |
| 13:00 | ✕ | 100% | 24134m | 0% | 66% | -23° |
| 14:00 | ✕ | 100% | 24134m | 0% | 66% | -30° |
| 15:00 | ✕ | 100% | 24135m | 0% | 66% | -37° |
| 16:00 | ✕ | 100% | 24135m | 0% | 66% | -44° |
| 17:00 | ✕ | 100% | 24135m | 0% | 57% | -50° |
| 18:00 | ✕ | 100% | 24134m | 0% | 57% | -54° |
| 19:00 | ✕ | 100% | 24135m | 0% | 57% | -57° |
| 20:00 | ✕ | 100% | 24135m | 0% | 57% | -56° |
| 21:00 | ✕ | 100% | 24135m | 13% | 57% | -53° |
| 22:00 | ✕ | 100% | 24134m | 26% | 57% | -48° |
| 23:00 | ✕ | 100% | 24134m | 39% | 57% | -42° |
| Thu, Apr 9 | ||||||
| 24:00 | ✓ | 100% | 24134m | 45% | 57% | -35° |
| 01:00 | ✓ | 100% | 21191m | 50% | 57% | -28° |
| 02:00 | ✓ | 100% | 24134m | 56% | 57% | -21° |
| 03:00 | ✓ | 100% | 23175m | 65% | 57% | -14° |
| 04:00 | ✕ | 100% | 4368m | 73% | 57% | -8.7° |
| 05:00 | ✕ | 100% | 4521m | 82% | 57% | -3.9° |
| 06:00 | ✕ | 100% | 2517m | 86% | 57% | -0.38° |
| 07:00 | ✕ | 100% | 1266m | 91% | 57% | 1.7° |
| 08:00 | ✕ | 100% | 604m | 95% | 57% | 2.3° |
| 09:00 | ✕ | 100% | 1157m | 97% | 57% | 1.3° |
| 10:00 | ✕ | 100% | 1271m | 98% | 57% | -1.3° |
| 11:00 | ✕ | 100% | 2247m | 100% | 57% | -5.2° |
| 12:00 | ✕ | 100% | 1523m | 100% | 57% | -10° |
| 13:00 | ✕ | 100% | 1623m | 100% | 57% | -16° |
| 14:00 | ✕ | 100% | 1666m | 100% | 57% | -23° |
| 15:00 | ✕ | 100% | 1745m | 100% | 57% | -30° |
| 16:00 | ✕ | 100% | 2281m | 100% | 57% | -37° |
| 17:00 | ✕ | 100% | 5389m | 100% | 47% | -43° |
| 18:00 | ✕ | 100% | 22952m | 88% | 47% | -49° |
| 19:00 | ✕ | 100% | 22981m | 76% | 47% | -53° |
| 20:00 | ✕ | 100% | 9293m | 64% | 47% | -55° |
| 21:00 | ✕ | 96% | 5919m | 61% | 47% | -54° |
| 22:00 | ✕ | 73% | 7135m | 59% | 47% | -51° |
| 23:00 | ✕ | 62% | 11036m | 56% | 47% | -46° |
| Fri, Apr 10 | ||||||
| 24:00 | ✓ | 76% | 7757m | 45% | 47% | -39° |
| 01:00 | ✓ | 100% | 1042m | 34% | 47% | -32° |
| 02:00 | ✓ | 100% | 1600m | 22% | 47% | -25° |
| 03:00 | ✓ | 100% | 4187m | 31% | 47% | -18° |
| 04:00 | ✕ | 100% | 2653m | 41% | 47% | -11° |
| 05:00 | ✕ | 100% | 1802m | 50% | 47% | -5.7° |
| 06:00 | ✕ | 100% | 5144m | 33% | 47% | -0.95° |
| 07:00 | ✕ | 98% | 20562m | 17% | 47% | 2.5° |
| 08:00 | ✕ | 99% | 23391m | 0% | 47% | 4.5° |
| 09:00 | ✕ | 84% | 24134m | 13% | 47% | 4.8° |
| 10:00 | ✕ | 64% | 24135m | 26% | 47% | 3.6° |
| 11:00 | ✕ | 96% | 23605m | 39% | 47% | 0.76° |
| 12:00 | ✕ | 98% | 17252m | 26% | 47% | -3.4° |
| 13:00 | ✕ | 98% | 23552m | 13% | 47% | -8.7° |
| 14:00 | ✕ | 98% | 23735m | 0% | 47% | -15° |
| 15:00 | ✕ | 98% | 24134m | 0% | 47% | -21° |
| 16:00 | ✕ | 95% | 24135m | 0% | 47% | -28° |
| 17:00 | ✕ | 72% | 24134m | 0% | 38% | -35° |
| 18:00 | ✕ | 43% | 24134m | 0% | 38% | -42° |
| 19:00 | ✕ | 33% | 24134m | 0% | 38% | -47° |
| 20:00 | ✕ | 5% | 24135m | 0% | 38% | -51° |
| 21:00 | ✕ | 5% | 24135m | 0% | 38% | -52° |
| 22:00 | ✕ | 5% | 24135m | 0% | 38% | -51° |
| 23:00 | ✕ | 5% | 24135m | 0% | 38% | -47° |
| Sat, Apr 11 | ||||||
| 24:00 | ✓ | 16% | 24135m | 0% | 38% | -41° |
| 01:00 | ✓ | 27% | 24135m | 0% | 38% | -35° |
| 02:00 | ✓ | 37% | 24135m | 0% | 38% | -28° |
| 03:00 | ✓ | 58% | 24135m | 0% | 38% | -21° |
| 04:00 | ✕ | 79% | 24135m | 0% | 38% | -14° |
| 05:00 | ✕ | 100% | 24135m | 0% | 38% | -7° |
| 06:00 | ✕ | 100% | 24135m | 2.3% | 38% | -1.3° |
| 07:00 | ✕ | 100% | 24135m | 4.7% | 38% | 3.3° |
| 08:00 | ✕ | 100% | 24135m | 7% | 38% | 6.7° |
| 09:00 | ✕ | 100% | 24135m | 18% | 38% | 8.4° |
| 10:00 | ✕ | 100% | 24135m | 28% | 38% | 8.5° |
| 11:00 | ✕ | 100% | 24135m | 39% | 38% | 6.9° |
| 12:00 | ✕ | 100% | 24135m | 30% | 38% | 3.8° |
| 13:00 | ✕ | 100% | 24135m | 21% | 38% | -0.67° |
| 14:00 | ✕ | 100% | 24135m | 12% | 38% | -6.2° |
| 15:00 | ✕ | 100% | 24135m | 8% | 38% | -13° |
| 16:00 | ✕ | 100% | 24135m | 4% | 38% | -19° |
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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