Will skies be clear over southern Ontario Friday night?
Cloudy skies are expected over most regions, except for southwestern regions where partly clearing skies are expected after midnight.

Will skies be clear over southern Ontario Wednesday night?

Cloudy skies are expected during the evening until most of the cloudiness moves eastward from southern Ontario, and then partly clearing skies are expected over most regions, except for southwestern regions where high clouds will be increasing before sunrise due to high-level moisture which is forecast to spread eastward over southwestern Ontario (illustrated below for Thursday morning).

Will skies be clear over southern Ontario Monday night?

Mostly cloudy skies with high-level cloudiness are expected, due to jetstream-level moisture over southern Ontario (illustrated below for early evening), followed by increasing mid-level and lower cloud by about midnight. The high cloud may be thin enough to allow the first quarter moon and brighter stars to be visible and cause the appearance of partly clear skies.

Will skies be clear over southern Ontario Saturday night?
Partly clear skies are expected over most regions, with lots of cloudiness south and east of Lake Huron and Georgian Bay, caused by moisture at low and high levels (illustrated below for early evening) and increasing high cloudiness is expected over all regions by midnight.

Will skies be clear over southern Ontario Friday night?

Mostly cloudy skies are likely over most regions, due to lots of low cloud caused by low-level moisture flowing southeastward from Lake Huron and Georgian Bay (illustrated below for mid-evening) except for some southwestern regions where mostly clear skies are likely by late evening (after evening cloudiness dissipates).

Will skies be clear over southern Ontario Tuesday night?
Partly or mostly clear skies are likely during the early evening, mainly in regions near, north and east of Lake Ontario, and then increasing high cloudiness is expected later in the evening (and earlier over regions west of Lake Ontario) due to high-level moisture which is forecast to move eastward over southern Ontario during the night (illustrated below for early evening).

Will skies be clear over southern Ontario Friday night?

Partly clear skies are expected during the early evening, and then increasing high cloud is likely later in the evening due to high-level moisture which is forecast to move over southern Ontario overnight (illustrated below for mid-evening).