More consumption in winter?

Hello! Have the following problem or simply a general question: For some time now I have noticed a significant extra consumption. Instead of 10.5 liters I am currently on 12.7 according to MFA. My problem is that a lot has been screwed on my car lately (in connection with problems with the LPG system) and I can’t assign what this is all about. Can this simply be related to colder outside temperatures? What else could it be? Thank you!