You can call it whatever you want, but I will just write some major contributors to risk factors in the above scenario:
- worse orientation capability in micro surroundings (you have to devout lot of time and energy to find path; you can take the wrong path, miss markings, miss signposts)
- worse orientation capability in macro surroundings (you can not deduce from surrounding area features where you are)
- temperature drop (you may be ready for temperatures around 0-5°C, but what if temperature drops far below that? In the night it can.)
- tiredness - impacts how safe your step/grip is. Also impacts judgment; if you combine that with orientation trouble, the outcome can unfortunately be really bad (changing your destination to get out while not really knowing where you are in the first place).
- decreased visibility affects how safe your step/climb is
Everybody who's at least moderately experienced mountaineer will tell you about these risks. I've also attended a couple of mountaineering courses where I've been told similar things. Also some mountain rescuers also gave lectures and presented reports of accidents and we broke down what caused them. There is even a campaign in Slovenian media to launch warnings about what can go wrong in the mountains. Everywhere you'll hear the similar things (but everyone else will probably be able to explain them better than I did though
).
You can have a lot of great experiences for the whole lifetime in our mountains if you are careful. I hope you'll make right decisions and travel safe. Bye!