I think this is selectable... I could be wrong. If it's not selectable, then you've got a Canuck car. Not unheard of, and you shouldn't have any issues since you're clearly not the one that imported it.
With the car parked (parking brake if you have the manual), use the up/down arrows on the right side of your steering wheel to navigate the in-dash information screen to the "CUSTOMIZE SETTINGS" tab. If you notice the progress bar at the right edge of the screen, I think it's at the bottom.
From there, go to "Meter Setup" and then "Adjust Outside Temp Display"
If you have the owner's manual, instructions are on page 90.