Dark Sky images show, meteogram-style, ACCESS or GFS hourly, total cloud cover forecast and moon phase (% illumination), and moon/sun rise/set times for particular locations out to ten days, to identify dark sky night opportunities. Dark sky night hours are defined by cloud cover < 20% and moon illumination < 50% (or no moon), and are displayed using star icons near the top of the graph. The table displays values of the moon phase and cloud cover during the night time hours using colour, transparency and symbols to visually depict the moon phase and dark sky night opportunities.
This service is relatively new. Please let us know if any issues.