Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are expected, due to lots of moisture at all levels, except for brief periods of mostly clear sky that could develop over some or most southern regions especially during early evening. The illustration below shows the forecast location of mid-level moisture during the early evening.

Will skies be clear over southern Ontario Saturday night?
Mostly cloudy sies are expected, except for mostly clear skies near, north and east of the GTA during the early evening, and then cloudiness is forecast to spread eastward across those regions by late evening. (The charts below illustrate the low and mid-level moisture during mid-evening.)

Will skies be clear over southern Ontario Friday night?

Mostly cloudy skies are likely, due to lots of low-level moisture which is forecast to be over southern Ontario overnight (illustrated above for early evening), except for some breaks in the low overcast which may appear occasionally during the evening, especially near Lake Erie and western Lake Ontario.

Will skies be clear over southern Ontario Wednesday night?
Mostly cloudy skies are likely over most regions due to lots of low-level moisture (illustrated below for mid-evening) and then increasing high cloud before morning, but skies could become partly or mosttly clear occasionally over some regions.

Will skies be clear over southern Ontario Monday night?

Partly clear skies are likely to develop over some regions, but mostly cloudy skies are likely most of the time over many regions south and east of Lake Huron and Georgian Bay, due to lots of low-level moisture flowing southeastward from the lakes (illustrated below for mid-evening).

Will skies be clear over southern Ontario Saturday night?
Mostly cloudy skies are expected over most regions overnight due to extensive low-level moisture flowing southeastward from Lake Huron and Georgian Bay (illustrated below for mid-evening), although partly clear skies may develop occasionally. Partly clear skies are likely before morning over most regions as the northwesterly flow backs to southwesterly, but increasing mid-level cloud is forecast to move eastward over southern Ontario.

Will skies be clear over southern Ontario Wednesday night?

Lots of high cloud is expected, especially during early evening, but clear periods are likely to occasionally result in skies becoming mostly clear.

Will skies be clear over southern Ontario Tuesday night?

Cloudy skies are expected, due to widespread high cloudiness caused by jetstream-level moisture which is forecast to be over southern Ontario overnight (illustrated below for early evening), but the high cloud may occasionally be thin enough to allow the bright gibbous moon to be easily visible and cause the impression of clear skies.

Will skies be clear over southern Ontario Monday night?
Mostly cloudy skies are likely over most regions due to lake-effect cloudines caused by cold air flowing across the lakes, except for a region of less cloudiness downwind of Bruce Peninsula to western Lake Ontario (illustrated below for mid-evening) and except for far southwestern Ontario, where less cloudiness is expected. Gradually clearing skies are likely before morning.

Will skies be clear over southern Ontario Sunday night?
Partly clearing skies are likely later in the evening, after jetstream-level cloud moves eastward (illustrated below for mid-evening), except for lots of low clouds near GTA and Lake Ontario due to low-level moisture (illustrated below for early and mid-evening). Then, before morning, increasing cloudiness is likely due to more low-level moisture which is forecast to move over most regions of southern Ontario before morning.

Will skies be clear over southern Ontario Thursday night?
Mostly cloudy skies are expected, due to widespread low-level moisture, but some clear breaks are possible.

Will skies be clear over southern Ontario Tuesday night?

Lots of cloudiness is likely during the early evening, due to low-level moisture which is forecast to remain over most regions of southern Ontario after sunset (illustrated below for early evening) and then clearing skies are expected later in the evening, except for continuing lake-effect cloudiness over regions south and east of Lake Huron and Georgian Bay (illustrated below for mid-evening, about 10 pm EST).

Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are likely over most regions, due to low-level moisture spreading southward over southern Ontario overnight (illustrated below for early evening), except for southwestern regions where skies are likely to remain clear during the evening and then become cloudy after midnight.

Will skies be clear over southern Ontario Saturday night?
Partly or mostly clear skies are expected, except for cloudy periods over regions south and east of Lake Huron and Georgian Bay, due to lots of low-level moisture (illustrated below for early and mid-evening) especially during the evening, and then mostly clear skies are likely after midnight.

Will skies be clear over southern Ontario Wednesday night?

Skies might be partly clear during the evening over some regions, but cloudy skies are likely over many regions due to lots of low-level moisture which is forecast to move over southern Ontario overnight (illustrated above for mid-evening).

Will skies be clear over southern Ontario Tuesday night?
Partly clear skies are expected over most regions, with lots of cloudy periods, caused by low-level moisture flowing south and east of Lake Huron and Georgian Bay (illustrated below for mid-evening).

Will skies be clear over southern Ontario Monday night?

Mostly clear skies are expected, except for some cloudiness during early evening over regions near and west of GTA and north of Lake Erie, due to mid-level moisture moving southward from southern Ontario during the afternoon (illustrated below for early evening) and except for regions south of Lake Huron and Georgian Bay, where low-level moisture from the lakes is likely to cause extensive lake-effect cloudiness (illustrated below for 10 pm EST).

Will skies be clear over southern Ontario Friday night?
Partly clear skies are expected over most regions, except for southwestern regions where skies are likely to be mostly cloudy by sunset. Lots of high cloud is expected, due to upper-level moisture moving over southern Ontario overnight (illustrated below) but skies may be clear enough for the rising full moon to be visible and cause the impression of partly or mostly clear sky.

Will skies be clear over southern Ontario Thursday night?
Mostly cloudy skies are expected over most regions, due to a region of mid-level moisture which is forecast to move eastward across southern Ontario overnight (illustrated below for early evening) but regions near the GTA may experience partly clear skies during early evening before the thicker cloud cover arrives.

Note: no further updates until November18.
Hope for clear skies somewhere!

Will skies be clear over southern Ontario Thursday night?
Mostly clear skies are expected during the evening, except for low clouds over some regions southeast of Lake Huron and Georgian Bay due to low-level moisture (illustrated below for early evening) and then increasing cloudiness is expected before morning.

Will skies be clear over southern Ontario Wednesday night?
Mostly cloudy skies are expected during the evening, due to widespread low-level moisture which is forecast to be over southern Ontario (illustrated below for early evening), followed by gradually clearing skies over most regions later in the night.

Will skies be clear over southern Ontario Saturday night?
Clearing skies are expected during the evening over most regions as moisture at low and high levels moves over southern Ontario (illustrated below for late evening), except for skies remaining mostly cloudy over regions south and east of Lake Huron and Georgian Bay.

Will skies be clear over southern Ontario Wednesday night?

Partly clearing skies are expected before sunset, but high-level cloudiness is likely to be visible over most regions most of the night, due to high-level moisture which is forecast to be over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Monday night?

Clearing skies are expected overnight, after cloud and moisture moves southward from southern Ontario overnight (low and mid-level moisture illustrated below for late evening).

Will skies be clear over southern Ontario Wednesday night?
Mostly clear skies are expected, except for some low clouds over regions south and east of Lake Huron and Georgian Bay, caused by low-level moisture flowing southward across the warm lake water (illustrated below for late evening).

Will skies be clear over southern Ontario Monday night? Partly clear skies are expected, especially from late evening until after midnight, following some early evening cloudiness due to lots of low-level moisture which is forecast to move eastward from southern Ontario later in the night (illustrated below for late evening). Increasing low cloudiness is expected before morning twilight.

Will skies be clear over southern Ontario Saturday night?
Skies are expected to be cloudy during the evening, due to extensive mid-level moisture over southern Ontario until the moisture moves south from Lakes Erie and Ontario later in the evening (illustrated below in the charts of 700 hPa moisture for EDT 20:00 and 23:00). Then, clearing skies are likely over most regions, except for regions south of Lake Huron and Georgian Bay, where extensive low-level moisture is likely to cause widespread low cloud cover (illustrated below for early Sunday).

Will skies be clear over southern Ontario Thursday night?

Clear skies are expected. Some low-level clouds may be visible occasionally during early evening as well as during the morning before sunrise.

Will skies be clear over southern Ontario Wednesday night?

Skies are likely to be partly or mostly clear, except for lots of low-level cloudiness over regions south and east of lake Huron and Georgian Bay, doe to low-level moisture (illustrated below for late evening).

Will skies be clear over southern Ontario Tuesday night?
Skies are likely to be mostly cloudy, but some periods of partly clear sky are likely, especially during early evening, before a layer of mid-level moisture moves across southern Ontario during the evening (illustrated below for late evening) and then lots of low-level moisture will likely cause lots of cloud cover after midnight.

Will skies be clear over southern Ontario Monday night?

Mostly clear skies are likely, except for some cloudiness south and east of Lake Huron and Georgian Bay, especially during the evening, caused by lake-effect moisture (illustrated below for early evening).

Will skies be clear over southern Ontario Sunday night?
Mostly or partly clear skies are expected during the evening, except for high cloud which may be visible, caused by jetstream-level moisture (illustrated below for early evening), and then increasing cloudiness at lower levels is expected later in the evening or after midnight.

Will skies be clear over southern Ontario Saturday night?
Skies are likely to be partly clear over most regions, with varying amounts of low and mid-level clouds, caused by some low and mid-level moisture over southern Ontario overnight (illustrated below for early evening).

Will skies be clear over southern Ontario Tuesday night?

Mostly clear skies are likely except for scattered low and mid-level clouds, due to some moisture over southern Ontario overnight (illustrated below for early evening).

Will skies be clear over southern Ontario Thursday night?

Mostly clear skies are expected, except for some low clouds which are likely to dissipate by or after sunset, and except for increasing high cirrus clouds which may move eastward over southern Ontario and appear before sunrise.

Will skies be clear over southern Ontario Saturday night?
Skies are likely to be cloudy over southwestern regions and mostly clear over regions near Georgian Bay and Lake Ontario during the early evening, and then become cloudy later in the evening or after midnight, due to mid-level moisture which is forecast to move eastward over southern Ontario during the evening (illustrated below for early evening).

Will skies be clear over southern Ontario Thursday night?
During the evening, mostly clear skies are expected over some regions except for regions near eastern Lake Erie and Lake Ontario, where high cloud will be visible until high-level moisture moves eastward from southern Ontario later in the night (illustrated below for late evening). During early morning, more high cloud is likely to move eastward over most of southern Ontario, caused by high-level moisture (illustrated below for early morning). Low clouds are also possible to appear over most regions overnight.

Will skies be clear over southern Ontario Wednesday night?

Mostly clear skies are expected, except for some clouds that may appear occasionally, caused by low-level moisture remaining over southern Ontario (illustrated below for late evening) following Wednesday’s cold front, as well as some high, thin jetstream-level clouds that may appear over southern regions of southern Ontario (close to Lakes Erie and Ontario) due to jetstream winds over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Saturday night?
Clear skies are expected, except for some high cloud over regions north of Lake Erie during early evening, until jetstream-level moisture (illustrated below for early evening) moves south from southern Ontario.

Will skies be clear over southern Ontario Friday night?
Mostly cloudy skies are expected during the evening (due to lots of low-level moisture remaining over southern Ontario), along with occasional clear breaks, and then gradually clearing skies are expected later in the night and early morning as the moisture moves southward from southern Ontario.

Will skies be clear over southern Ontario Wednesday night?

Mostly clear skies are expected during the evening, except for some low clouds that may appear occasionally, and then increasing high cloudiness is expected later in the night.

Will skies be clear over southern Ontario Tuesday night?
Partly clear skies are expected, but lots of low-level clouds, as well as some mid-level and high cloudiness will likely be visible in the moonlight, due to lots of jetstream-level moisture over southern Ontario (illustrated below for late evening).

Will skies be clear over southern Ontario Monday night?
Mostly clear skies are expected, except for some high cloud due to jetstream-level moisture over regions near Lakes Erie and Ontario during the evening (illustrated below for early evening) and except for some low clouds that are likely to appear occasionally, and fog forming over some regions, due to very humid air over southern Ontario.