How does the weather in "rocks in my pocket" affect the plot of the story?

If this still helps, then thats good. I was having a problem with this question as well, but later I figured it out want to share the answer with all those who need it. 
. In the passage “Rocks in My Pocket,” the weather plays some role in Sophie’s ability to get a job, because in a way the weather prevented her from getting the job as a pianist rather than the first job to work at the coat factory. Sophie was wearing a heavy coat to carry the rocks but,” The weather was really too warm for the coat she was wearing but it was the best way to conceal the rocks that would insure her success.” (lines 24 and 25) Later when its Sophie’s turn to go on the scale, the official says, “’You’re sweating, so I don’t think you need the coat…’” The official realizes that the girls where trying to fool him with the rocks and immediately sends Sophie back. If the weather were colder, than the coat would’ve looked more believable, while the warmer weather serves as the reason why Sophie didn’t get her workers permit the first time around, and didn’t get the job at the coat factory, So in a way, its better the weather turned out like this, because in the end Sophie ends up with a job she loves, a pianist.