The '1' in the temperature

In North Texas we have now had a month of 100+ degree days. There doesn't seem to be any end in sight. The last time I remember it being like this was the record-breaking summer of 1980. The main difference now is that I don't have two toddlers to contend with--and so far, my air conditioning is working, unlike then. For a week.

But upon careful thought--and air conditioning working--I've decided that if there's to be a '1' as the first digit in my outdoor temperature, I'd rather it be followed by two digits than a single one. Below 19, I don't do so good.