I checked the outside temperature one morning, it was 37F (2.8C). I thought to myself, "Not bad. I can take the bike to work today."
Then I opened the refrigerator and noticed the thermometer in there was also 37F. It was that moment that I realized I was going to ride to work in my refrigerator!
New rule: No riding when it's colder outside than it is inside my fridge. :D