In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: However , the standard deviation of the daily high temperature for the coastal city will be less than that of the inland city .
A: 
Thus , while these two cities may each have the same average maximum temperature , the standard deviation of the daily maximum temperature for the coastal city will be less than that of the inland city as , on any particular day , the actual maximum temperature is more likely to be farther from the average maximum temperature for the inland city than for the coastal one .