Air temperature greatly affects water temperature. When the sun is strong, it increases the temperature of the air and water. On the other hand, when the sun is less intense, the temperature of the air and water decreases.

Higher temperature air is less dense.
Less-Dense air has a higher temperature

The air temperature of the air is cold when it rains and the cloud temperature is cold when it rains

Lower temperature air is more dense.

There are two types of air temperature measurements on aircraft, Ram Air Temperature and Static Air Temperature. (slower aircraft don't normally have RAT gages) Ram Air Temperature, sometimes known as Total Air Temperature, is the air temperature outside the aircraft increased by the heat resulting from the compressibility of the air. The faster the aircraft, the more the rise in the temperature. Static Air Temperature, also known as Outside Air Temperature, is a temperature reading corrected for the compressibility rise to give a true outside air temperature which is used in all sorts of calculations relating to engine performance, aircraft speed, etc.