Rule
Dark Skies
Milky Way over Tromsø
Norway
Moonless nights with crystal-clear skies for Milky Way shots
No opportunities right now
Here’s what usually blocks matches
No dark sky conditions. During polar night, Tromsø offers extended darkness for astrophotography.
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Rule requirements (key thresholds)
Astronomical Night · Any Total Cloud Coverage · ≤ 20.0% Visibility · ≥ 12000.0m Precipitation Chance · ≤ 10.0%
Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.
Most common blockers (next 72 hours)
Visibility 83% failing
Total Cloud Coverage 43% failing
Astronomical Night 42% failing
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/Oslo
No opportunities in the next 14 days
See the blocker timeline above to understand which conditions are preventing matches.
What this forecast looks for
Plain-language explanation from the ruleDark Skies conditions for Milky Way and deep sky photography:
- Astronomical Night: True darkness after twilight ends
- Cloud Cover: Clear skies essential for star photography
- Moon Phase/Position: Low moon illumination or moon below horizon
- Visibility: Excellent transparency for faint objects
Best conditions for capturing the Milky Way, nebulae, and star fields.
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 72 hours
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time Europe/Oslo | 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° |
|---|---|---|---|---|---|---|
| Fri, Jan 9 | ||||||
| 07:00 | ✕ | 0% | 440m | 0% | 61% | 13° |
| 08:00 | ✕ | 0% | 440m | 0% | 61% | 9.7° |
| 09:00 | ✕ | 0% | 400m | 0% | 61% | 5.1° |
| 10:00 | ✕ | 0% | 340m | 0% | 61% | 0.09° |
| 11:00 | ✕ | 0% | 340m | 0% | 61% | -5.2° |
| 12:00 | ✕ | 0% | 380m | 0% | 61% | -10° |
| 13:00 | ✕ | 0% | 400m | 0% | 61% | -15° |
| 14:00 | ✕ | 0% | 360m | 0% | 61% | -20° |
| 15:00 | ✕ | 0% | 320m | 0% | 61% | -23° |
| 16:00 | ✕ | 0% | 340m | 0% | 61% | -25° |
| 17:00 | ✓ | 0% | 360m | 0% | 61% | -26° |
| 18:00 | ✓ | 0% | 400m | 0% | 61% | -25° |
| 19:00 | ✓ | 0% | 360m | 0% | 61% | -23° |
| 20:00 | ✓ | 0% | 380m | 0% | 61% | -20° |
| 21:00 | ✓ | 0% | 360m | 0% | 61% | -16° |
| 22:00 | ✓ | 0% | 360m | 0% | 61% | -12° |
| 23:00 | ✓ | 0% | 360m | 0% | 61% | -6.8° |
| Sat, Jan 10 | ||||||
| 24:00 | ✓ | 0% | 420m | 0% | 61% | -2° |
| 01:00 | ✓ | 0% | 300m | 0% | 51% | 2.4° |
| 02:00 | ✓ | 0% | 280m | 0% | 51% | 6.3° |
| 03:00 | ✓ | 0% | 260m | 0% | 51% | 9.3° |
| 04:00 | ✓ | 0% | 220m | 0% | 51% | 11° |
| 05:00 | ✓ | 0% | 200m | 0% | 51% | 12° |
| 06:00 | ✓ | 0% | 200m | 0% | 51% | 11° |
| 07:00 | ✕ | 0% | 200m | 0% | 51% | 9.6° |
| 08:00 | ✕ | 0% | 220m | 0% | 51% | 6.6° |
| 09:00 | ✕ | 0% | 240m | 0% | 51% | 2.7° |
| 10:00 | ✕ | 0% | 220m | 0% | 51% | -2° |
| 11:00 | ✕ | 0% | 220m | 0% | 51% | -7° |
| 12:00 | ✕ | 0% | 180m | 0% | 51% | -12° |
| 13:00 | ✕ | 0% | 140m | 0% | 51% | -17° |
| 14:00 | ✕ | 0% | 140m | 0% | 51% | -22° |
| 15:00 | ✕ | 0% | 140m | 0% | 51% | -26° |
| 16:00 | ✕ | 0% | 180m | 0% | 51% | -29° |
| 17:00 | ✓ | 0% | 180m | 0% | 51% | -31° |
| 18:00 | ✓ | 0% | 200m | 0% | 51% | -32° |
| 19:00 | ✓ | 0% | 180m | 0% | 51% | -30° |
| 20:00 | ✓ | 0% | 180m | 1% | 51% | -28° |
| 21:00 | ✓ | 0% | 200m | 1% | 51% | -24° |
| 22:00 | ✓ | 6% | 220m | 2% | 51% | -20° |
| 23:00 | ✓ | 39% | 180m | 3% | 51% | -15° |
| Sun, Jan 11 | ||||||
| 24:00 | ✓ | 86% | 220m | 3% | 51% | -11° |
| 01:00 | ✓ | 82% | 280m | 4% | 41% | -5.9° |
| 02:00 | ✓ | 100% | 320m | 6% | 41% | -1.6° |
| 03:00 | ✓ | 100% | 500m | 9% | 41% | 1.9° |
| 04:00 | ✓ | 100% | 420m | 10% | 41% | 4.6° |
| 05:00 | ✓ | 89% | 580m | 9% | 41% | 6.1° |
| 06:00 | ✓ | 87% | 560m | 8% | 41% | 6.4° |
| 07:00 | ✕ | 93% | 1060m | 6% | 41% | 5.5° |
| 08:00 | ✕ | 86% | 4060m | 4% | 41% | 3.4° |
| 09:00 | ✕ | 48% | 58900m | 1% | 41% | 0.24° |
| 10:00 | ✕ | 39% | 64960m | 0% | 41% | -3.8° |
| 11:00 | ✕ | 36% | 51000m | 0% | 41% | -8.5° |
| 12:00 | ✕ | 42% | 58660m | 1% | 41% | -14° |
| 13:00 | ✕ | 53% | 70320m | 2% | 41% | -19° |
| 14:00 | ✕ | 75% | 66860m | 3% | 41% | -24° |
| 15:00 | ✕ | 100% | 64820m | 3% | 41% | -29° |
| 16:00 | ✕ | 100% | 60160m | 4% | 41% | -32° |
| 17:00 | ✓ | 100% | 60160m | 4% | 41% | -35° |
| 18:00 | ✓ | 100% | 60160m | 4% | 41% | -37° |
| 19:00 | ✓ | 100% | 59640m | 4% | 41% | -37° |
| 20:00 | ✓ | 100% | 60160m | 4% | 41% | -35° |
| 21:00 | ✓ | 0% | 920m | 4% | 41% | -32° |
| 22:00 | ✓ | 33% | 740m | 4% | 41% | -28° |
| 23:00 | ✓ | 100% | 1300m | 3% | 41% | -24° |
| Mon, Jan 12 | ||||||
| 24:00 | ✓ | 97% | 2120m | 3% | 41% | -19° |
| 01:00 | ✓ | 96% | 600m | 2% | 33% | -14° |
| 02:00 | ✓ | 97% | 260m | 2% | 33% | -9.3° |
| 03:00 | ✓ | 98% | 180m | 2% | 33% | -5.3° |
| 04:00 | ✓ | 98% | 300m | 2% | 33% | -2° |
| 05:00 | ✓ | 99% | 340m | 3% | 33% | 0.26° |
| 06:00 | ✓ | 99% | 340m | 4% | 33% | 1.5° |
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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