Devils Tower National Monument
82 Good night. No moon all night, clear skies.
Why
| Cloud | 96 | 3% cloud, essentially clear |
| Moon | 100 | new moon, below the horizon all night, so no moonlight at all |
| Darkness | 100 | 10h46m of astronomical darkness, 6:21pm–5:07am |
| Transparency | 95 | Dewpoint spread 11.5°C, dry and steady air |
| Targets | 0 | Leonids running, about 0 an hour at best |