The picture shows the weather forecast of a city1October 20 13 19 ~ 22 released by central weather bureau. Look at the picture and answer 2 1 ~ 22.2 1. The picture shows four consecutive days.

A, according to the change of temperature in the material, it can be seen that the temperature is decreasing, so it does not meet the meaning of the question;

B, according to the change of temperature in the material, it can be seen that the temperature is decreasing, so it is correct;

C, according to the change of wind force in the material, it can be seen that the wind speed first increases and then decreases, which does not meet the meaning of the question;

D, according to the weather forecast in the material, it can be seen that it is rainy when the cold front passes, and there are fewer clouds before and after the cold front, which does not meet the meaning of the question.

So choose: B.