Hail Is Rarer in the Highest Seasons

In warm weather the lower parts of the earth are cold and in a frost they are warm. The same thing we must suppose happens in the air so that in the warmer seasons the cold is concentrated by the surrounding heat and causes the cloud to go over into water suddenly. For this reason raindrops are much larger on warm days than in winter and showers more violent. A shower is said to be more violent in proportion as the water comes down in a body and this happens when the condensation takes place quickly. Though, this is just the opposite of what Anaxagoras says. We get hail when the process of freezing is quicker than the descent of the water.