Joe,
We have had so many rapid and radical temperature changes over the past two years that I can't ever get comfortable. It may be 75 one day and 35 the next. You are right about us all not being sick as I have worried about that but so far have really been fortunate that I only had one bad day with my nerves and sinuses. But there are a lot of people around here with bad colds. Even when the sun is out it doesn't seem to put any heat to the ground.
Ron