What is the degree of cold that permits combining the prayers?

The Shaykh : It is exactly like this, and perhaps it is more precise, because it is a relative matter: combining the prayers on account of the cold. People differ in how they are affected by the cold, some more and some less. No person is like a barometer or a thermometer that can determine that when it reaches a certain degree, it harms everyone. There is no such precise determination. So, who assesses the situation? The imam, and so on. Yes.