As previously quoted, many variables will control your mileage. What Honda posts on brochures and the like is based under ideal driving conditions. I've seen below 40 and above 50mpg. Honda doesn't offer mileage guarantees.
The range you see when turning on the car is the estimated range. It is affected by how you've driven in the past and the weather. There was a software update that improves the estimate. From somewhere, I have this.... "The fix for our notoriously inflated HV range estimate is out and ready to be installed at your Honda dealer as of June 12.
This update is Service Bulletin SB 18-069 and is a software update that will not take long."
Yes, my EV range is reducing from 47 down to 36-37 I am here in Cincinnati Ohio in the last few weeks the temperature is going down between 22-30 degree my estimate EV range have been effect by the weather temperature I expected this is the normal way to go in the winter I think the Honda dealer cannot do anything with it.
Yes, we bought our Clarity in late summer and it charged to an estimated range as high as 53 miles at one point. Now that overnight temps are down in the 10-20 degree range here in Iowa the estimate has dropped to 35 after a full charge. Recent use has involved the heater (obviously) and also the heated seats, all of which I'm told will impact range, along with reduced battery capability in the cold. I'm hoping it doesn't go much below 35 this winter.