The weather in Tianjin is 65438+1October.

A, the weather symbol for thunderstorm, so option A does not meet the meaning of the question;

B, a symbol for cloudy weather, so option B meets the meaning of the question;

C, the weather symbol for sunny days, so option C does not meet the meaning of the question;

D represents the weather symbol of heavy rain, so option D does not meet the meaning of the question.

Therefore, choose: B.