Here in Kingston Ontario we can get the worst of both worlds. Stinking hot for a few weeks in summer and this winter with it's bitter cold. I have a 2016 30kwh Leaf with 26,000K and haven't lost any capacity bars. Most of my travel is urban suburban with some highway round trips to areas not further than 75K from base. I have only fast charged once. It was close to home. I just wanted to see if I knew how to use the charger. Temperatures were fairly cool that day. I went from 28% to 90% in about 25 minutes and went from 4 temp bars to 5. I do use a/c sparingly and rarely drive faster than 105km/hr on the freeway. This past summer I don't think I ever went above 8 bars in the temp. I will watch it more closely this coming summer. As more DCFCs come on line in my service territory I will experiment with them and post the results. I do think that if you live in an area with periods of prolonged high temperatures and you like to drive 75mph with the a/c on then the Leaf is definitely not the car you want.