Not at all - if you've lived in GA as long as I have. GA's winters have always been like this - warm one weekend, cold the next. It's not uncommon.
In my parents time, they weren't talking about global warming, they were talking about the impending ice age.
Here is a thought - do you really think that humans are powerful enough to effect such a massive change as a complete warming of the Earth? Look at the data, and it is not clear that humans are causing it. What if the Earth is naturally going through a warming that we are not the cause of? Then we are trying to fight something that probably is bigger than us. That does not mean that we should not try to do something about protecting our environment, but we shouldn't assume that it is something that we can easily change or reverse.