Hi joedo, most folks smoke year round regarless of the outdoor temp, there are a few things you can do to make the weather a little less of a factor for example locate your smoker in a protected area, away from wind, rain and snow, or make a wind break( a three sided structure that protect's your smoker from the wind)
Also some folks wrap their smoker with a welders blanket to help it hold it's temp (not covering the vents of course)
These are just a few ideas, I'm sure others have even more.