I just got back from a 43km cruise with my wife and a friend. I was on my 16X. Temperature today was 7C and then 11C. Nice and sunny.
Here are the stats:
Riding weight: ~70kg
Battery start and stop: 95% - 3% (66v) (also for some reason my 5A charger didn't charge the 16X all the way to 100)
The first 18km took the battery down to 50% and the internal temperature according to Darknessbot was 15C and later on it was 31C.
EUC: MSX 84v