Will skies be clear over southern Ontario Friday night?
Partly or mostly clear skies are likely over southwestern regions, following some cloudiness during the evening, while mostly cloudy skies are expected over most other regions, caused by widespread low-level moisture, except that skies could occasionally become partly or mostly clear over regions where gaps develop in the moisture, especially before morning.

Will skies be clear over southern Ontario Tuesday night?

Mostly cloudy skies are expected, mainly due to widespread jetstream-level moisture over southern Ontario overnight (illustrated below for late evening) as well as some low-level moisture over some regions, except that partly clear skies may develop over some southwestern regions where gaps in the high cloud could allow skies to occasionally become partly or mostly clear.

Will skies be clear over southern Ontario Monday night?

Mostly cloudy skies are expected during the evening, due to lots of low-level moisture (illustrated below for early evening) as well as lots of jetstream-level moisture causing high cloud overnight, followed by clearing skies later in the evening (except for the widespread high cloud remaining over most regions overnight).

Will skies be clear over southern Ontario Sunday night?
Clear skies are expected, except for some thin high cloud that may appear later in the evening and after midnight over some regions, caused by jetstream-level moisture which is forecast to move across southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Saturday night?
Mostly clear skies are expected during the evening, and then high cloudiness may appear over many regions after about midnight, as well as low cloud and mist that may develop over some regions before morning.

Will skies be clear over southern Ontario Friday night?
Mostly cloudy skies are likely, due mainly to a high cloud deck, but partly clear skies could develop occasionally over some regions where thinner gaps in the high-level moisture allow stars to become visible and give the impression of partly clear sky.

Will skies be clear over southern Ontario Thursday night?
Mostly cloudy skies are likely over most regions, due to extensive low-level moisture and cloud, except for partly clear skies that may develop over some regions occasionally.

Will skies be clear over southern Ontario Wednesday night?
Mostly clear skies are likely over many regions, except that periods of cloudiness are likely over regions south and east of Lake Huron and Georgian Bay, caused by extensive low-level moisture flowing southeastward from the lakes (illustrated below for late evening).

Will skies be clear over southern Ontario Tuesday night?

Mostly clear skies are likely during some of the evening over some regions near Lake Erie and western Lake Ontario where atmospheric moisture diminishes (illustrated below for mid-level moisture). Otherwise, lots of low and mid-level moisture is likely to cause mostly cloudy skies.

Will skies be clear over southern Ontario Monday night?
Mostly cloudy skies are likely, due to lots of mid and high-level moisture, except for partly clear skies occasionally over some regions where the high cloud diminishes enough for stars to be visible.

Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are expected, except for partly or mostly clear skies that may develop occasionally over some regions where the low cloud diminishes and allows stars and the bright gibbous moon (after moonrise) to appear.

Will skies be clear over southern Ontario Thursday night?
Mostly cloudy skies are expected, due to lots of high clouds, but skies may become mostly clear for several hours during late evening and around midnight over regions north of Lake Erie where mid and high-level moisture diminishes before increasing again before morning (illustrated in the total cloud cover chart shown below).

Will skies be clear over southern Ontario Wednesday night?

Mostly clear skies are expected, except for some scattered low cloudiness that may appear especially over regions east of Lake Huron and Georgian Bay.

Will skies be clear over southern Ontario Tuesday night?

Partly clearing skies are expected over most regions, except for lots of cloudiness over regions south and east of Lake Huron and Georgian Bay, especially during the evening (illustrated below with low-level moisture during early evening). Less cloudiness is likely later in the night as winds back to southwesterly and lake-effect cloudiness diminishes over regions south of the lakes.

Will skies be clear over southern Ontario Saturday night?
Partly or mostly clear skies are likely over some regions during the evening, except for occasional cloudiness over some regions due to varying amounts of low and mid-level moisture that is forecast to move over southern Ontario, and then increasing high-level cloudiness is expected especially after midnight.

Will skies be clear over southern Ontario Friday night?

Partly clear skies are likely with lots of lake-effect cloudiness over regions south and east of Lake Huron and Georgian Bay.

Will skies be clear over southern Ontario Wednesday night?

Mostly cloudy skies are expected, due to lots of moisture flowing southeastward from Lake Huron and Georgian Bay, except that clear breaks may develop occasionally over some regions and allow stars to appear and give the appearance of clear sky.

Will skies be clear over southern Ontario Monday night?

Clear skies are expected over most regions, except for southwestern regions where moisture flowing southward from Lake Huron (illustrated below for early evening) will maintain mostly cloudy skies over those regions, and except for some low clouds remaining over some regions for several hours after sunset.