Suppose to get cold tonight

No one else showed up for the group run at PTA at 5:30 this evening.  It was in the 40's and the wind was strong.  Am not sure what the wind chill was, but it had to be cold.  I took off on the out and back 5K course, but was so cold that I turned around at the one-mile mark and went back.  So, I got in 2 miles.  It is suppose to get down to 23 tonight.