Guidelines for purchase or lease added to Wiki section on battery capacity:
"Guidelines suggested by Weatherman on whether the Leaf is likely to experience temperature related accelerated battery capacity loss in your area:
If you almost always see five bars or less on the battery temperature gage, and it only gets up to six bars a handful of times each summer... Don't worry about it.
If you see five bars or less during the winter half of the year, and fairly often see six bars during the summer half... You probably are going to see the loss claimed by Nissan (20% loss at 5 years and 30% loss at 10 years).
If seeing six bars is common for a large part of the year, and a seventh bar pops up occasionally during the summer months... Don't consider buying. Lease would be OK.
If you spend a large part of the summer with seven temperature bars or more showing... It's probably best to avoid the Leaf completely. Consider an EV with an active thermal management system or the Chevy Volt."
You can inquire on the forum how many battery temperature bars others who live in your area are typically seeing.