What is the principle of forecasting the weather with a household thermometer?

By measuring the temperature, relative humidity and atmospheric pressure of the family environment, the rainfall probability is calculated by using these three parameters.

Generally speaking, the lower the temperature, the higher the relative humidity and the lower the air pressure, the higher the rainfall probability.

The accuracy of this kind of home weather forecast is not high, which is basically similar to teasing you.

You don't have to be too serious, and you don't have to smash it just because it says that the probability of rain is 90%.