Looks like a dry conversation. But! The defunct mantelpiece clock symbolically represents Gatsby's delusional perception of time and his desire to prevent time from moving forward. Although it has been five years since the last time he saw Daisy, Gatsby genuinely believes that he can ignore the present and return to the moment he met Daisy in Louisville. ^w^
The verb "looks" would be in this case a linking verb, since it is helping the reader understand the point of view of the observer. The weather itself is of course not "looking" anywhere.
