Ooo! Ooo! This is fun.

Here's some very real evidence that the amount of snow you experience at your house might not be the most scientific way to measure global temperature. This file shows very clearly how the surface temperatures have been increasing in our industrial age. NASA animated MP4 File

Also note that increasing temperatures lead to shifting climate patterns and instability in between...so yeah, you might get some bouts of colder than normal between the slightly warmer than normal stuff.