Stargazing HK | Hong Kong Stargazing Forecast & Dark Sky Guide
An almanac for Hong Kong stargazers — when the sky is dark, the moon is kind, and the clouds are thin.
How this score works
Each night gets a 0–100 score based on four things, weighted by how much they matter:
- Sky clarity (45%) — average cloud cover during astronomical darkness.
- Darkness (25%) — moon brightness, weighted by how long it's above the horizon.
- Spot (20%) — light pollution at the chosen location (Bortle scale).
- Haze (10%) — humidity penalty above 70% (Hong Kong summers are hazy).
The longest stretch of forecast cloud cover ≤ 40% during astronomical darkness. The most reliable time to head out.
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