Seattle. 2013 SV 38K miles, 12 bars.
LeafSpy (1/2/2016 )
264 gids (94%) 60.89 Ahr 93.59% Hx
This strikes me as really quite good compared to what a lot of folks report but Seattle climate is ideal for EVs. Over the last few months my capacity as reported by Leafspy has actually increased which I understand is common as the temperature cools combined with more full 100% charge cycles which seems to boost reported values.
I track all my stats pretty closely and I've noticed that my efficiency has improved as I've owned the car although the actual Miles/KwH trend is hard to observe as the seasonal variation dominates the trend.
Below are my max and min 3-month averages Using Miles / kWh as reported by the car or Car Wings (they match pretty well). I also keep track of how many kWh I put in the car from the charger and I find those numbers "measured from the wall" match these but multiplied by about .89 . (I suspect this is the pooled charging inefficiencies.
Summer Winter
2014 4.9 3.9
2015 5.2 4.1
2016 4.0*
* estimated
I thought for a while that I was just getting "better" but in October I got new tires at about 33K) and immediately lost about 4-5% of my efficiency. I wonder if the gradual improvement, buried in the seasonal variation. was little more than reduction in rolling resistance due to tire wear. I suspect I may get this back as the tires get a little wear on them.
I've always been surprised by the strong seasonal factors. In 2015 the car appears to be about 25% more efficient in peak summer for me. Combined with the fact that the battery seems to gain capacity (or the BMS decides to let you use it) means I get much larger range in Summer (90+ miles) compared to winter (70 miles).
Estimated Seasonal Variation factors:
1) Temperature (denser air with increased wind resistance, battery temperature effects, more heat and defog, seat heater, steering wheel heater, etc. )
2) Number of days of rain (increased rolling resistance, more wipers and defog)
3) More wind (always seems to be hurting)
3) Shorter days (more headlights)
2) Usage patterns (better traffic, better routes - not dropping kids at school during commute)