Enjoy your rides like usual. I have been doing this in sub zero temps for a long time and I still slow down alot in the cold. I put on my Nokians after thanksgiving and they stay on through March. My average speed drops by about 3mph and my normal 1 hour commute ends up being 1 hour 20 mins. The worse part of that is I'm out longer in the cold and its DARK out. Warmer and longer days are coming and this Arctic air will pass and we'll return to basking in the 30's again.