"Global Warming"/"Climate Change" is, to state something pretty obvious, about additional energy in an active system. That means, of course, more total heat across the entire system.

However, I think a far more important aspect is how much more active the system as a whole gets. I don't have time to get into it in detail here, but overall that means there will be more and more extremes. More droughts. More floods. More severe winds. More heat waves. More freezing storms. We're already seeing that in action and the rate at which the number of extremes increase will tend to increase as more energy is sent into a somewhat chaotic system.