Will skies be clear over southern Ontario Sunday night?
Mostly clear skies are expected over most regions, except for some cloudiness during the evening over regions near, north and east of western Lake Ontario.

Will skies be clear over southern Ontario Saturday night?
Mostly clear skies are expected, except for occasional periods of low cloud that may develop over some regions.

Will skies be clear over southern Ontario Friday night?

Partly or mostly clear skies are expected over most regions, except for mostly cloudy skies near, north and east of the western Lake Ontario area until late evening or about midnight, and except for periods of low clouds especially over southwestern regions.

Will skies be clear over southern Ontario Thursday night?
Cloudy skies are expected over most regions, except for occasional periods of partly or mostly clear skies over some regions of southern Ontario where mid-level and low cloud clears out and where fog doesn't form.

Will skies be clear over southern Ontario Wednesdy night?
Mostly cloudy skies are expected, but there may be enough clear breaks to cause skies to occasionally become mostly clear for several hours at a time over some regions.

Will skies be clear over southern Ontario Monday night?

Generally clear skies, except for varying amounts of high cloud, are expected, and fog may develop over some locations by early morning.

Will skies be clear over southern Ontario Sunday night?
Partly clear skies are likely over some regions, while mostly cloudy skies are likely over various other regions where thunderstorms or convective cloud develops ahead of a warm front which is forecast to move over southern Ontario overnight.

Will skies be clear over southern Ontario Saturday night?
Partly or mostly clear skies are likely over southern Ontario during the evening, followed by increasing cloudiness after midnight, caused by increasing moisture spreading over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Friday night?

Cloudy skies are expected due to widespread high cloudiness, although some stars may be visible and occasionally cause the appearance of partly clear skies, and then clearing skies are expected by about sunrise, as high cloudiness moves eastward from southern Ontario. Fog may develop in regions where the sky clears before morning, due to increasingly humid air moving over southern Ontario overnight.