Cloud free night was the bomb until a recent change has happened and Access data is no longer available...
As such, you can consider several other models and attempt to work it out from there.
Theses include.... (bookmarked for my sky in Melbourne)
https://www.cloudfreenight.com/
https://www.meteoblue.com/en/weather...-37.82N144.97E
http://m.yr.no/place/Australia/Victo...urne/long.html
https://www.accuweather.com/en/au/me.../26216?hour=29