Precisely - the dryer it gets during winter the colder it gets, which is what is happening at present in our region not far from Sydney. Over the last three days the early morning temperatures have been in the minus 7 C area. All because there is very little moisture in the atmosphere. It is water vapour (cloud cover) that keeps the Earth warm at night by trapping the long wave radiation from escaping into outer space and as a consequence during winter in frost prone areas if there is cloud cover very little to no frost occurs. But when there isn't any cloud cover the climate Nutters Co2 just isn't up to doing what they suppose its job should be!! So work that out because they can't!!!!!