-17C still seems more than a bit nutty, thats not cold, its goddam snowing. Even if it is realistic (google is showing me no love on minimum temps in new england) I just find it more annoying than any sort of challenge in a game sense. Im generally looking at ENC of at least 1 or 2 on every body part and having to take up 1/4 of my inventory letters (this is one of the real stand out niggles) with stuff just to keep me semi warm. Even with all that im going to have the chilly debuff on a fair chunk of the time for places like mouth, hands and feet (other big niggle, especially mouth) that are just a bastard to get the right gear for. I can work around it, but its just not fun for me. The low temps arent scary, they arent really dangerous, im not short on gear to get through them (if I kill 50 Zs on day 1, how many sets of clothes do you think I have?) they just mean more fiddling and more micro and that just isnt that fun.
If you want to keep it like it is or something similar then id like to be at least able to stand and read without having to go through all the micro of sorting my clothes out, let me automatically put on stuff that is on the tile im standing on or something.
Beds should come with blankets. This seems damn obvious, trying to find warm stuff to cover every part of my body then moving it to a bed so I can sleep without waking up to cold is again, for me, more hassle than challenge or fun.
Fires? Yeah, fires are pretty much 100% useless for keeping you warm right now, you would have to do something about that as well, anything that will last long enough for you to sleep near or read next to will generally set you on fire as well. I havent noticed heaters in cars yet either, though I havent looked into vehicles much in my last few games, but they would be another must.
Mouth encumbrance will probably need a rework, things are set up now so you pretty much always want to be wearing at least a dust mask for normal gameplay. With this and stuff that will keep my mouth warm most of the time im looking at 3 mouth enc all the time, or most of the time with much more micro. As things currently stand some headgear like the motorbike helmet is beyond totally useless as well.
There is plenty more I guess, but I think you can see what im getting at.
Maybe the solution is not to change the weather, but to change other mechanics that were previously expecting a more random weather?
Now im sorry, but im not 100% sure what you mean here, but im thinking my answer is if its a choice between changing the weather to something more realistic in a game sense (another big thing, honestly I couldnt give a nicotine addicted monkeys fart what the weather is meant to be like realistically, its what needs to work in a game sense and be fun to play with) and changing/reworking 10 other things to fit in around the weather, id tone the weather down, but hell, im not the guy doing the coding.
Better fix might be to have a toggle for weather in world settings, Off, Mild, Normal, Extreme. Something like that.