Although the actual atmospheric lapse rate varies, under normal atmospheric conditions the average atmospheric lapse rate results in a temperature decrease of 6.4C°/km (3.5F°/1,000 ft) of altitude above ground level. The measurable lapse rate is affected by the moisture content of the air (humidity).
It is much more likely that, given his immature responses to problematic events in the play, that he is probably about sixteen or seventeen years old. In William Shakespeare’s Romeo and Juliet, the exact age of Romeo is never explicitly stated. Juliet’s age is 13, and she is almost about to turn 14.