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Given a location (e.g. Osoyoos, British Columbia) and human eyes only, what's the ranges for the nights of the year most likely to give clear astronomical viewing?

What historical data sources might be mined for a clue? Satellite vs surface? Would the past few years/decades reliably help to predict the future year?

Constrained to the new moon cycle, how might the clearest months be determined?

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closed as too broad by Jan Doggen, Fred, trond hansen, BillDOe, Peter Jansson Oct 14 at 6:28

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Average cloudiness comes to my mind. However I don't know if all weather stations record that and where they would publisize such data. $\endgroup$ – AtmosphericPrisonEscape Oct 11 at 11:56
  • $\begingroup$ This seems to me more of an astronomy question than earth sciences. Why not do what I would do and check the local weather forecast? $\endgroup$ – Michael Walsby Oct 11 at 12:11
  • $\begingroup$ Additionally, cloudiness & time of year might be a factor. The Canadian weather service (Canadian Meteorological Centre @ Environment Canada may have such records. $\endgroup$ – Fred Oct 11 at 12:11
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    $\begingroup$ Accuweather offers an astronomy weather weather forecast. You could also ask someone from the Department of Physics & Astronomy @ the University of British Columbia. You could also ask Jack Newton who apparently lives in Osoyoos, as listed in the Astronomy in British Columbia listings. $\endgroup$ – Fred Oct 11 at 12:23
  • $\begingroup$ General sources of weather data which may or may not help: opendata.stackexchange.com/questions/10154 $\endgroup$ – Barry Carter Oct 11 at 13:14