Well, it's been half a year. I've adjusted since my original post, smoking in the garage. The benefits being light, power, no wind, and general comfort. However, it's still cold.
I have finally gotten over a recent mild head cold, so it's been a week since I had a smoke. Since then the weather has been unseasonably cold here in the SF bay area, getting down to freezing at night.
I've come to the same point I was back earlier this year wondering if there's any way around being outside. I started using a parabolic dish space heater, but it's not really meant for as large a space as a garage so it only heats my knees. I also have been using a fan to draw the smoke out the garage door, but that creates its own draft. I used to think I could tolerate cold fairly well being a warm-bodied person, but it seems that those days may be behind me since taking up smoking in the garage.
Any other advice besides just smoking in the house (which is not an option) and not smoking at all? :no: