How much does the cold weather affect fuel consumption?

Friends are falling close to zero at night. The average fuel is around 8.9 liters. First of all, with 50 TL and 130 km or so, it is around 110 km. Does cold affect this much?

I also open in heating eco mode sometimes does it have much effect?

Is this normal when the engine burns a lot in cold?

my teacher came to me normally.

My friend affects more if you use the air conditioner too high. It increases as the air cools. the same is happening to me

The effects are of course.No abnormal situation.