Dark-sky score
Each city moonrise page includes a dark-sky score for tonight: a 0–100 grade that blends moon illumination, typical light pollution (Bortle class), and how much of astronomical night the Moon spends above the horizon.
How to read the score
- Excellent / Good — darker windows for Milky Way or meteor watching.
- Fair / Poor — moonlight or urban skyglow dominates; lunar detail is still easy.
- Bright — near-full moon or heavy light pollution; plan deep-sky work for another night.
Scores are heuristic guides, not weather forecasts. Clear, dry air still matters more than any number.
City moonrise pages
Open a city to see tonight’s score, moonrise/set, and a 30-day table.