Personally, I would say guaranteeing it year round and year after year with battery ageing would be risky. Depends how important this trip is and whether you have an alternative vehicle in very cold weather. I would assume that you want to drive economically but keep up with traffic.
As Nikki says, the terrain and temperature have an effect in addition to your driving style. My benchmark for buying the Twizy was a hilly 31 mile fast A road route to friends where I can recharge and Renault would not guarantee it would cover this.
It does do it with some miles left, but I would not risk it if 40 miles is needed-when new it might do it, but if the batteries reduce their capacity (the hire agreement says they will replace if they do not hold 75% charge) then you will not.
It depends on your circumstance and type of roads, but I would say on a good day it will do it-but not “easily” all the time as asked.
Hope this helps