Will skies be clear over southern Ontario Friday night?

Mostly cloudy skies are expected, although some partly clear skies may develop during early evening and allow the planets and brighter stars to be visible and to cause the appearance of clear skies over some locations until thicker cloud cover moves over southern Ontario later in the evening.

Will skies be clear over southern Ontario Thursday night?

Lots of cloudiness, moisture and uplift will remain over southern Ontario overnight along the frontal zone that is over southern Ontario. Mostly cloudy skies  is probably the best answer to the question, but occasional patches of less cloudiness may appear from time to time that may give the appearance of partly clear skies.

Will skies be clear over southern Ontario Wednesday night?

Skies will most likely be cloudy except that skies may be partly clear during the early evening over eastern regions of southern Ontario (generally near Lake Ontario and GTHA) where some mid-level clouds (remaining after possible showers and thunderstorms that may develop during the afternoon) and some clear sky may be visible, until more substantial mid-level moisture (illustrated below for late evening) moves eastward over southern Ontario and causes skies to be mostly cloudy overnight.

Will skies be clear over southern Ontario Tuesday night?

Clear skies are expected.

Will skies be clear over southern Ontario Monday night?
Clear or mostly clear skies are expected, although some scattered low and mid-level clouds may remain over southern Ontario during the evening until all of the moisture with Monday's cold front moves east and leaves clear skies overnight.

Will skies be clear over southern Ontario Saturday night?
Clear skies are expected during the evening, followed by increasing jetstream-level high cloudiness beginning over southwestern regions after midnight. Some high thin jetstream-level clouds may also be visible during the evening over all regions, due to jetstream winds over Ontario (illustrated below for late evening).

Will skies be clear Friday night over southern Ontario?
Clear skies are expected by sunset and overnight.