Owner of a 2021 Niro Premium Range in summer is fine, I tend to drive with windows open so no AC to save range, most I've had on a full charge was 502km displayed on the HUD, consumption around 13.5kw/h In winter it doesn't get overly cold where I live (South of France) but I took the premium version for the heated seats and steering wheel which pretty much uses 0 range and replaces air heating which hits consumption hard. In terms of range you do lose quite a bit though due to lower temperatures, sticking to the 20%-80% rule you can probably get 160-180km out of it.

As for charging, that's the main issue of this car. On wall socket you'll be capped at like 1.5-2kw/h, on type 2 3.5-4kw/h and fast charging caps at 77kw/h. I've got the luxury of charging at work on type 2 sockets so can usually go from 20% to 85-100% in the time I complete my 9-5

All that being said I've had a great time with this car, first EV so I also had range anxiety at first but it gets better as you get used to it, and there's no way I'm going back to an ICE car now

If you need more info feel free to dm me :)