Five temp bars shouldn't concern you. Think of six bars as the place where you might want to postpone charging if possible. Keep it between 20% and 80% most of the time, and occasionally charge to 100% right before driving it, and you're doing all you can do. Oh, and when the night will be cool, park it outside.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.
The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.