Monday 28 October 2019


Will skies be clear over southern Ontario Monday night?
Clear skies are expected until high cloudiness gradually increases, beginning near sunset over southwestern regions and near or after midnight near western Lake Ontario, caused by jetstream-level moisture which is forecast to spread eastward over southern Ontario overnight (illustrated below for late evening).




Sunday 27 October 2019

Will skies be clear over southern Ontario Sunday night?
Clearing skies are expected, with skies clear over southwestern regions during the evening, cloudy skies near western Lake Ontario, and skies gradually clearing from west to east as low-level moisture (illustrated below for late evening) gradually moves eastward overnight.


Friday 25 October 2019


Will skies be clear over southern Ontario Friday night?
Mostly clear skies are expected, except for cloudiness during the evening over regions near, north of and east of western Lake Ontario until low-level moisture  (illustrated below for early evening) moves eastward later in the evening, and except for increasing high (jetstream-level cirrus) cloudiness that may appear over southwestern regions before morning.



Thursday 24 October 2019


Will skies be clear over southern Ontario Thursday night?
Partly clear skies are likely, except for lots of high cloudiness caused by jetstream-level moisture over southern Ontario overnight (illustrated below for late evening) along a strong jetstream which is over southern Ontario during Thursday.




Tuesday 22 October 2019

Will skies be clear over southern Ontario Tuesday night?
Mostly cloudy skies are expected, due to lots of low cloud, except for regions near Lakes Erie and  Ontario, where skies may become partly or mostly clear for several hours or more.

Sunday 20 October 2019

Will skies be clear over southern Ontario Sunday night?
Mostly clear skies are expected, except for occasional low clouds (and possibly fog before morning) over some regions, and except for increasing high cloudiness before morning.

Saturday 19 October 2019

Will skies be clear over southern Ontario Saturday night?
Partly or mostly clear skies are expected, except for lots of high cloudiness caused by varying amounts of high-level moisture forecast to be over southern Ontario overnight (illustrated below for early evening).


Thursday 17 October 2019

Will skies be clear over southern Ontario Thursday night?
Mostly cloudy skies are expected, except for mostly clear skies over southwestern regions.

Monday 14 October 2019

Will skies be clear over southern Ontario Monday night?
Mostly clear skies are expected, with some scattered clouds that may appear occasionally over most regions.

Sunday 13 October 2019

Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are expected over most regions, except for regions near Lakes Erie and Ontario where skies are likely to be partly or mostly clear for several hours during early evening, until widespread cloudiness spreads eastward over all regions by late evening.

Saturday 12 October 2019

Will skies be clear over southern Ontario Saturday night?
Mostly clear skies are expected, except for some low-level clouds that may appear occasionally over some or most regions.

Friday 11 October 2019


Will skies be clear over southern Ontario Friday night?
Mostly cloudy skies are expected, except for partly clear skies (with lots of high cloud) near and east of western Lake Ontario during the first several hours of the evening, until cloudiness moves eastward over all regions.


Thursday 10 October 2019

Will skies be clear over southern Ontario Thursday night?
Mostly clear skies are expected over most regions, except for increasing high cloudiness over southwestern regions, caused by high-level moisture which is forecast to move eastward over southwestern Ontario (illustrated below for late evening).


Monday 7 October 2019

Will skies be clear over southern Ontario Monday night?
Clear skies are expected. Some low clouds may appear, caused by some low-level moisture which is forecast to be over southern Ontario during the evening (illustrated below for late evening).

Sunday 6 October 2019



Will skies be clear over southern Ontario Sunday night?
Mostly cloudy skies are expected, except for partly clear skies near western Lake Ontario during early evening, until high-level moisture (illustrated below for late evening) moves northeastward over this region (and most regions) and causes mostly cloudy skies by about mid-evening.