[cdumler]

If you have ever had to deal with an air conditioner isn't cooling because of low freon, you'd know that the problem is because the coils get.. too.. cold. They get so cold that water in the air freezes around the coils to be the point there is little air flow possible. Why?

When the freon is low, the freon expands too much into the coils. More expansion, more temperature drop in the coils. Additionally, the compressor has too little freon to compress to sent out to the radiator. The local coil's temperature has gone down, but the overall temperature of the system has gone up. This is the difference between weather (local) and climate (overall average). The weather of the coil is cooler, the climate of the A/C system is hotter.

Global warming is creating changes in the energy flow, both atmospheric and oceanic. Consequently, you may have locally cooler temperatures because hotter temperatures in other create blocks energy movement that would otherwise heat your area.