Temperature was around 35F when I left this morning. The streets were wet, but it was a fairly nice ride, except for one corner where the back tire stepped out a bit. It wasn't much, but was enough to raise the heart-rate for a few seconds. This happened as I was heading into the Missouri River valley. I then noticed all the cars in the valley had a think layer of frost on the windows. Yep, it was a little colder down there! I was very careful around all corners the rest of the way to work.