Actually, were the world climate merely getting colder, it would probably get drier and more stable.
If you want to see wild weather, you have to introduce energy somewhere, otherwise you wouldn't have much weather.
The average temperatures at the surface are incresing.
That doesn't mean that they'll increse for me, say, in any given year, but it does mean that more energy will be available to create weather, and extreme events may become more common.
The reason for the increase in average surface temperatures is another matter.
Is it a function of greenhouse gases, or is it the result of our sun entering a more active period?