Weather b day

A, the highest temperature on this day is 9℃, and the lowest temperature is 3℃, so it is wrong;

B, as can be seen from the picture, it was a four-level northeast wind that day, so that's right;

C, this weather symbol indicates that light rain turns to moderate rain, which is not suitable for people to travel, so it is wrong;

D, this weather symbol means that light rain turns to moderate rain, and the business of the car wash shop on this day should be very poor, so it is wrong.

Therefore, choose: B.