It might be a little colder, just because we don't get chinooks like they do in Alberta. We average 117 frost free days, and our average minimum temps for Jan and Feb are -22.3 and -18.2 degrees C respectively, we had a doozy of a winter this years with temps in the - 30's and 40's for days and weeks on end. Yuck!
Saskatoon is about a zone 3, although geographically we fall into a zone 2b. Microclimates considered and with snowcover in the city we can often pull off a zone 4 if there's protection from the wind.....I'll try to get a rose list together. We actually have 2 gardens in town, the other is the Patterson Gardens at the U of S. It has lots of old rarer roses too, and was established in the 60's.
Koren