It depends. Stuff like that was common used in the taxis, but was never a problem, regardless of temperature, simply because the engines rarely shut off for any lengthy period of time, and there was more than enough ambient heat to keep it liquid on even the worst days. However, there were nights where I have seen frozen washer fluid reservoirs, but that's at -40 and colder, and a vehicle that hadn't moved for a day or two. As for the gooey mess talk, this stuff look very much like the Loblaw's President's Choice washer fluid, which is totally overdone with the dye, looking like someone dropped a toilet puck into the bottle.
For your temperatures, I doubt you'll have the slightest issue with performance. I'm not sure where you get your gas, but Petro-Canada and Esso with their programs would keep you awash with washer fluid fairly easily.