Note: no updates will be able to be posted until Monday, July 3.

Will skies be clear over southern Ontario Thursday night?
Mostly or partly clear skies are likely during mid to late evening over regions between Lake Ontario and Georgian Bay (following gradual clearing of clouds and moisture that may remain from afternoon thunderstorm activity), while mostly cloudy skies are likely over southwestern regions due to more low and mid-level moisture expected over southwestern regions (illustrated below for late evening) which is forecast to move eastward and cause cloudiness over most regions by early morning. Regions under partly or mostly clear skies by late evening may have varying amounts of high-level cloud visible and with high humidity and light winds, fog may develop over some regions and lots of dew is possible.

Will skies be clear over southern Ontario Wednesday night?
Cloudy skies are expected by sundown, although breaks in the high cloud may allow the moon and brighter stars and planets to appear over some regions during the early evening and give the impression of partly clear skies.

Will skies be clear over southern Ontario Tuesday night?

Mostly clear skies are expected over most regions of southern Ontario as Tuesday’s daytime cloudiness and moisture moves southeastward from southern Ontario by about sunset (illustrated below for late evening), except for some cloudiness over southwestern Ontario during the evening caused by some mid-level moisture which is forecast to move southeastward over southwestern Ontario and Lake Erie.

Will skies be clear over southern Ontario Sunday night?
Lots of cloudiness, along with occasional periods of partly clear skies, are expected, due to moisture remaining over southern Ontario (illustrated below for late evening) after cloudiness and precipitation associated with Sunday afternoon's cold front moves eastward during early evening.

Will skies be clear over southern Ontario Saturday night?
Partly clear skies with some periods of mostly cloudy conditions are expected over most regions, due to low and mid-level moisture which is forecast to be over southern Ontario overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Friday night?
Cloudy skies are expected during the evening, followed by gradually clearing skies around or after midnight over most regions as Friday afternoon's cloudiness and moisture gradually moves eastward from southern Ontario. The illustration below shows jetstream-level moisture remaining over parts of southern Ontario during late evening.

Will skies be clear over southern Ontario Sunday night?
Clearing skies are expected during the evening as moisture associated with Sunday afternoon's storms is forecast to move eastward from southern Ontario by about sunset (illustrated below for late evening) and remaining patches of moisture and low clouds (especially over regions that received heavy rainfall) are likely to move eastward during the evening.

Will skies be clear over southern Ontario Thursday night?

Clearing skies are expected over southwestern regions overnight, while cloudy skies are expected over the rest of southern Ontario, due to mid-level moisture moving eastward from southwestern Ontario overnight (illustrated below for early morning).

Fog is likely to form in many regions where skies become clear (due to very moist air at ground level).

Will skies be clear over southern Ontario Wednesday night?

Partly or mostly clear skies are expected this evening, except for more cloudiness over southwestern regions and some high clouds over most regions, followed by generally increasing cloudiness by morning, due to moisture (illustrated below for late evening) ahead of a warm front which is forecast to move eastward over southern Ontario during Thursday.

Will skies be clear over southern Ontario Tuesday night?

Partly clearing skies are expected this evening over some regions (generally between western Lake Ontario and Georgian Bay) while more cloudiness is likely over southwestern regions as a result of moisture moving southwestward from southern Ontario later Tuesday and overnight (illustrated below for late evening).

Will skies be clear over southern Ontario Monday night?

Cloudy skies are expected over most regions, caused by moisture (illustrated below for late evening) along a weak low pressure trough and cold front which is forecast to move southward over southern Ontario overnight. Skies may become partly clear following the frontal passage over northern regions of southern Ontario, such as near southern Georgian Bay, but lots of high-level clouds are likely to cause partial cloudiness.

Will skies be clear over southern Ontario Sunday night?
Mostly clear skies are expected, except for some mid-level cloud that will likely be visible at sunset due to some mid-level moisture over eastern regions of southern Ontario (illustrated below for the hour before sunset), and except for some high-level thin cloudiness that will most likely be visible occasionally over most regions, caused by high-level clouds moving eastward from strong thunderstorm activity over the western Great Lakes region during Sunday.

Will skies be clear over southern Ontario Saturday night?

Clear skies are expected overnight, except for some thin high cloud that may not be detectable especially after moonrise.

Will skies be clear over southern Ontario Friday night?

Mostly cloudy skies are expected until early morning, when mid-level moisture associated with a weak low pressure trough is forecast to move eastward from southwestern regions (illustrated below for early morning), but lots of moisture at ground level may cause fog to develop in regions where skies become partly or mostly clear. Some high-level clouds may also become visible if mid-level cloudiness clears.

Note: no forecast updates will be able to be posted until Friday June 9 (or possibly Thursday June 8).

Will skies be clear Saturday night over southern Ontario?
Some regions will be under mostly clear skies for the first couple of hours after sunset, and mostly cloudy skies are expected by midnight over most regions due to mid-and high level moisture which is forecast to move over southern Ontario overnight (illustrated below for late evening).

Will skies be clear Friday night over southern Ontario?

Partly clear skies are expected and lots of mid-level cloudiness is likely over most or all regions of southern Ontario, due to a region of mid-level moisture which is forecast to move southeastward across southern Ontario overnight (illustrated below for late evening).