Ugh I'm surprised this is still an issue :( How dumb. Sorry to hear you've had to deal with that :( I know it's so dumb that they don't change their clothes when they come inside from certain weather. Like come on take your winter gear off in house! I also hate traveling somewhere and see NPCs around in the wrong weather gear. I avoid any events during winter because I don't want to see or trigger dumb NPC deaths. I don't want to shut off the thing where Sims don't get influenced by the weather because where is the fun in that? But everyone dying because of a BIG oversight is no fun :(