Shame it was released in late Autumn, then. A growing number of iPhone X users reports issues with X’s touchscreen when in cold temperatures, i.e. outdoors. Here is the very first Reddit post that comes up when searching for the topic:

I’ve noticed that my iPhone X screen becomes very unresponsive as soon as I step outside. It literally takes 2 seconds from going inside to the cold outdoors and my screen stops being very responsive. I try swiping on websites and it doesn’t register my finger. It’s very noticeable. Is anyone else having this problem?

Edit: possible other explanation might be the drastic changes in light that are causing problems.

Edit2: looks like some people are having issues while others are not. Might be different colors/sizes of iPhones that were affected. Can we get Apple to investigate?

Apple is, indeed, investigating the issue. Company released an official statement in which it says that it acknowledges the issue, believes it is of software nature and promises a fix in the next patch.

For such a great device, X seems to have a number of problems…