Will skies be clear over southern Ontario Friday night?
Mostly clear skies are expected, except for some high cloudiness that might be visible occasionally, caused by increasing jetstream-level moisture (illustrated below for late evening) and except for some low-level cloud that may develop early Saturday over some locations.

Will skies be clear over southern Ontario Thursday night?
Skies are likely to be mostly cloudy over the regions between western Lake Ontario and Lake Huron, due to extensive low-level moisture which is forecast to be over these regions (illustrated below for late evening) and partly or mostly clear over most other regions.

Will skies be clear over southern Ontario Wednesday night?

Cloudy skies are expected, due to high cloudiness caused by jetstream-level moisture that is likely to remain over southern Ontario overnight (illustrated below for early Thursday) after low and mid-level cloudiness moves eastward from southern Ontario during the evening.

Will skies be clear over southern Ontario Tuesday night?
Skies are likely to be partly clear with cloudiness moving eastward during the evening, leaving less cloudiness after midnight, but high thin jetstream-level cloud as well as smoke aloft will likely cause a hazy appearance to skies where low and mid-level clouds diminish.

Will skies be clear over southern Ontario Monday night?
Mostly clear skies are expected, except for some high-level cloudiness caused by high-level moisture (illustrated below for late evening) that may not appear as distinct cloudiness but may add to the general haziness caused by the smoke aloft.

Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are likely over most regions, due to lots of high-level cloudiness which is expected, but locations where clouds are thin enough to allow the moon and planets to be visible are likely to be quite hazy due to lots of smoke aloft.

Will skies be clear over southern Ontario Friday night?
Cloudy skies are expected, except that cloud cover may be thin enough during early evening over some regions to allow the moon and bright planets to appear until thicker cloud moves over southern Ontario later in the evening.

Thursday night: clear skies are forecast over southern Ontario, but smoke aloft from western wildfires will be causing some haziness.

Will skies be clear over southern Ontario Wednesday night?

Mostly clear skies are expected, except for some high clouds that are likely to appear occasionally over most regions, due to high and mid-level moisture remaining over southern Ontario overnight (illustrated below for late evening). Some haziness is likely due to smoke aloft from western wildfires.

Will skies be clear over southern Ontario Saturday night?
Partly or mostly clear skies are expected, except for some low-level coud that may appear over many regions caused by low-level moisture which is forecast to be over most of southern Ontario  (illustrated below for late evening), and except for low, mid-level and high clouds that may appear over southwestern regions remaining from thunderstorm activity that may develop Saturday afternoon over southwestern regions. Where skies become mostly clear, skies may appear hazy due to widespread smoke aloft over southern Ontario.

Will skies be clear over southern Ontario Wednesday night?
Skies are likely to become mostly clear over regions near western Lake Ontario, the GTHA and southern Georgian Bay by the end of evening twilight, except for some thin high cloud that may be visible, while cloudy skies are expected over southwestern regions, and some amount of high cloudiness is likely to be over regions between southwestern Ontario and Lake Ontario due to jetstream-level moisture (illustrated below for Wednesday evening). Then, before morning, low clouds or fog may develop over locations where the sky remains mostly clear, while increasing cloudiness is expected to spread northeastward over southern Ontario.

Will skies be clear over southern Ontario Tuesday night?
Mostly clear skies are expected with some high thin clouds that may appear from time to time, but skies may be hazy due to widespread smoke aloft from western wildfires.

Will skies be clear over southern Ontario Monday night?
Mostly cloudy skies are likely, due to cloudiness caused by substantial moisture flowing northwestward over southern Ontario during Monday (illustrated below for mid-level moisture Monday night) except for some regions near Lake Huron where skies may remain partly clear.

Will skies be clear over southern Ontario Sunday night?
Partly or mostly clear skies are likely due to lots of moisture in the atmosphere at low, middle and high levels, except for more cloudiness over some regions where moisture will be more significant (illustrated below for mid-level moisture during late evening). Smoke aloft will also be contributing to cause hazy skies over most regions.

Note: no further updates will be posted until Sunday August 12.
Clear skies! (except, expect smoke aloft to cause hazinesss at times.)

Will skies be clear over southern Ontario Thursday night?
Mostly cloudy skies are likely during the evening until mid-level moisture moves southeastward from most regions after midnight (illustrated below for early Friday) and then clearing skies are expected over most regions, except for southernmost regions where moisture may remain and cause mostly cloudy skies until morning. Fog is likely to develop by morning over most regions where skies become clear. In addition, smoke and aerosol particles aloft from western wildfires (illustrated below for Thursday) may cause skies that become cloudless to appear hazy.

Will skies be clear over southern Ontario Wednesday night?
Mostly cloudy skies are likely during the evening, followed be gradually clearing skies as moisture gradually moves southward from Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Tuesday night?

Mostly cloudy skies are expected, with lots of middle and high-level moisture forecast to be over southern Ontario (illustrated below for late evening) but breaks in the high cloudiness will occasionally allow the brighter stars and planets to appear and to give the appearance of partly clear skies. With the very humid air over southern Ontario, fog is likely to form in regions where skies become clear enough for the ground to radiate heat and cool down enough for fog to develop.

Will skies be clear over southern Ontario Sunday night?
Mostly clear skies are likely, except for some clouds that may be visible occasionally due to some moisture over southern Ontario (illustrated below for mid-level moisture during late evening) and except for widespread smoke from western forest fires spreading over most of North America (illustrated below for Saturday, August 4).

Will skies be clear over southern Ontario Saturday night?
Mostly clear skies are expected (following some cloudiness during early evening) except for some cloudiness that is likely to appear occasionally due to patches of mid-level and jetstream-level moisture which are forecast to move over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Friday night?
Partly or mostly clear skies are expected with some scattered low clouds that may appear over various regions, and partly cloudy skies during the evening may result from leftover clouds remaining from thunderstorm activity near regions where thunderstorms develop during the afternoon or evening.

Will skies be clear over southern Ontario Thursday night?

Mostly cloudy skies are likely, due to widespread high cloudiness caused by jetstream-level moisture over most regions with the jetstream, spreading northward over southern Ontario overnight (illustrated below for late evening).