That doesn't make it true. According to NOAA, this November was one of the WARMEST ever on record. Some parts of the US and probably elsewhere in the world have seen serious winter weather this year, but that's hardly proof of cooling.
Additional energy in the atmosphere can manifest in many ways. For instance, by pushing cold northern air farther south than it usually goes. As always, in a system as complex as the Earth's atmosphere, it's practically impossible to prove any kind of causal relationship on any timescale shorter than a few hours.
Regardless of what the weather looks like out my window, I believe the overall global temperature measurements. The Earth is getting warmer.