Bonnie and I went to Montreal several years running first week of July for the jazzfest
It was blues, jazz, modern and rock actually
One year it was high 90's so we rode up to St-Sauveur.
BIG Waterpark, lots of fun maybe an hour north of the city, add time getting thru the city to that as the prior poster says its kinda not intuitive
Watch the speed limits 90kph is not 90mph

Quexpress is in Montreal but we never did manage to hook up, did see Pierre tho
Found the people friendly but most of them smoke cigarettes nonstop
someday we will return and do a big loop to the maritime provinces and down thru Maine