November trend:
The next system tracks into northern Ontario on Halloween. A strong southwest flow ahead of that system Monday night and Tuesday will bring temperatures back to the upper teens and lower 20s in southern Ontario for the first day of November on Tuesday.
"Most of Canada will be mild during the first week of November and the Great Lakes should have several days of milder weather next week, which could then spread east into Atlantic Canada," says Weather Network meteorologist Dr. Doug Gillham. "However, expect a significant pattern change to develop during mid-November (and persist into December) that will likely feature the dominate trough position near the Great Lakes with below seasonal temperatures expected to become more widespread and dominant for the second half of November."