The Malbim interprets it differently. He says that 'kodrim' refers to the animals that would be parched and scorched in the heat of the son if there was not sufficient water available to them. One of the great wonders of this world is that water is so abundant. Water is the prerequisite for all known forms of life. Teleological reasoning views this as indication of an overall design and plan.
Random chance can be the cause of singular events.
The sun, moon and constellations all have predictable patterns. We can calculate their appearance with great accuracy. Rainfall, on the other hand, is very unpredictable. Yes, once the clouds appear it is possible to predict with some degree of reliability the likelihood of precipitation. But the appearance of rain bearing clouds is very difficult to predict with any degree of accuracy.