Located in Netherlands I drive a leaf bought new in January 2015. ( 24 KWH battery)
I drive 5 times a week around 22 miles a day and charge at night using standard EVSE cable on a 240 Volt 16 Amp outlet in my garage.
I use the timer to start charge after midnight ( not in the weekend) and use the 80% option to extend battery life. Charging is stopped at 7 am and I have always had normal range after a charge.
Only used 100 % charge a couple of times to handle a longer journey.
In a year I have now 5900 miles on my Odo and all looks fine.
Another thing is the SOH readout, it is at 88% after just one year and 5900 miles.
Temperature in Netherlands in summer rarely gets above 80 F and winters are mild, not below 23 F .
I have heard that SOH lowers faster in the first year but I had not expected this rapid decrease.
I have a yearly check-up at my dealer scheduled next week, should I raise this issue ? A "normal" user ( without OBDII dongle and Leafspy) would not notice anything unusual !!
Your SOH values might be artificially low due short drives and charging only to 80% most of the time. What about Hx?
I can't speak to your climate at all as I've only been the the Netherlands once, during December 2010.
Here are some semi-recent stats from my 2013 Leaf (built 5/2013) that's resided in the SF Bay Area:
http://www.mynissanleaf.com/viewtopic.p ... 46#p449846
I don't follow my stats that closely, but yesterday (2/6/16) they worse than I remember seeing before.
Except for the final charge on Friday, all my charges earlier in the week were only to 80%.