What is cyclonic rainfall? What are fronts?

Cyclonic rainfall occurs due to cyclones and depressions irrespective of relief or convection. It is caused by convergence of two different air masses with different temperatures and other physical properties. When warm and cold air masses confront each other, the warmer air generally climbs above the colder air. The boundary zones of these air masses are called the fronts.

The rising air is cooled while undergoing a frontal lift. This causes precipitation. Such precipitation is called cyclonic rainfall.