Will skies be clear over southern Ontario Saturday night?
Cloudy skies are expected during the evening followed by gradually clearing skies after midnight. Lots of low-level moisture will remain over most regions during early morning (illustrated below for early Sunday) and so periods of low clouds are likely to cause occasional cloudy skies and occasional partly clear skies between midnight and morning.

Will skies be clear over southern Ontario Monday night?
Skies are expected to be cloudy during the early evening, becoming partly cloudy about mid-evening, partly or mostly clear after midnight for about 2-3 hours, and then cloudy again before sunrise.
The overnight clearing is expected because mid-level moisture is forecast to move southward from southern Ontario after midnight (illustrated below for the hour after midnight) and then widespread low-level moisture is forecast to move over southern Ontario before dawn and cause low-level clouds over most or all regions.

Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are expected to continue over most regions of southern Ontario except for regions approximately near and northwest of the GTA, where skies are partly clear during the afternoon and will most likely remain mostly or partly clear during the evening. Increasing patches of high jetstream-level cloud are likely to appear over these regions until thicker lower-level cloud moves overhead later in the night ahead of Monday's storm system.

Will skies be clear over southern Ontario Thursday night?
Mostly clear skies are expected, except for some low clouds that may persist over some regions during early evening, caused by a region of low-level moisture which is forecast to move eastward from southern Ontario during the evening (illustrated below for early evening) and except for increasing high clouds that may appear over southwestern regions before morning.

Will skies be clear over southern Ontario Tuesday night?
partly or mostly clear skies are expected over many regions, except for some high-level clouds expected during the evening, due to jetstream-level moisture (illustrated below for early evening), and low clouds expected to form east of Lake Huron and near the north lakeshores of Lakes Erie and Ontario, due to low-level moisture (illustrated below for early evening).

Will skies be clear over southern Ontario Monday night?
Partly or mostly clear skies are likely over most regions, except for occasional low clouds overnight and except for some scattered mid-level clouds during the early evening, caused by some regions of low and mid-level moisture forecast to move eastward across southern Ontario (illustrated below for evening).

Will skies be clear over southern Ontario Sunday night?
Mostly clear skies are expected over most regions, except for some scattered low clouds especially over regions south and east of Lake Huron and Georgian Bay.

Will skies be clear over southern Ontario Thursday night?
Partly or mostly clear skies are likely to appear over most regions, except for low-level cloudy periods especially over regions south and east of Lake Huron and Georgian Bay.

Will skies be clear over southern Ontario Wednesday night?
Mostly cloudy skies are likely, due to lots of moisture in the atmosphere, but occasional clear skies may develop over most regions from time to time.

Will skies be clear over southern Ontario Tuesday night?
Partly clear skies are expected, due to lots of low-level moisture (illustrated below for early evening) causing some periods of low-level cloudiness, mixed with periods of mostly clear sky.

Will skies be clear over southern Ontario Monday night?
Partly clear skies are expected over most regions, mixed with occasional periods of mostly cloudy skies due to lots of low-level moisture that is forecast to be over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Saturday night?
Partly, or mostly clear skies are expected over many regions during the evening, except for more cloudiness south and east of Lake Huron and Georgian Bay. Later, more cloudiness is expected due to increasing mid-level moisture which is forecast to move northeastward over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Friday night?
Mostly cloudy skies are likely over most regions, especially over the regions south and east of Lake Huron and Georgian Bay, due to lots of moisture in the lower and mid-levels of the atmosphere and cold air flowing across the warm lakes, but clear skies are likely to develop occasionally, especially over southwestern regions.

Will skies be clear over southern Ontario Monday night?

Partly clear skies are likely during the evening, except for lots of low-level cloudiness near and north of GTA due to low-level moisture south and east of Lake Huron and Georgian Bay (illustrated below for early evening) and then skies are likely to become cloudy after midnight (or by late evening in southwestern regions) due to cloudiness ahead of Tuesday’s low pressure trough.

Will skies be clear over southern Ontario Saturday night?
Some clear periods are likely to appear over most regions from time to time, but mostly cloudy skies are more likely to be the situation during most of the night (except for the clear breaks) due to extensive low-level moisture over southern Ontario.