Originally Posted by
Pratt
[...] so September is my default.
We've had a glorious month of September here is Quebec, this year. Few rainy days, pretty warm by our standards.
This site may prove useful to get a feel for the more recent weather patterns, in addition to
Weatherspark. One thing, perhaps, would be hurricanes. NPs are (apparently)
closed because of Fiona. This is unusual and can probably be anticipated days in advance if you keep up with the news.