What are your experiences with low temperature extremes while operating Canon Rebels?

Just like others mentioned you will be fine with the temps. My first DSLR was the Canon XTi (400D) and I used it to take pictures of snowmible races. Temps will go down as much as -20F with wind chills of -35F. I paired it with a battery grip which helped a lot. And just like imqqmi said, I let my camera in the bag actually until next day. Just to make sure it will be ok. Besides, after a whole day outside under those conditions, when I got home all I want to do is taking a nice long warm bath and go straight to bed. Good luck and enjoy!

Silmarie