U can say that u would go to places where there's no water and cause rain over the place.
U could also talk about the clould formation making it your story like u were a water droplet then u evaporated then u became a cloud ad then u would rain and the cycle would start again.
U could describe the places u have been to so far, describe the mountain of your origin, the lake, ocean or pond u were a part of, then describe the sun from the cloud's point of view. Then u could also talk about ppls' varied reaction to rain, like the kids enjoy rain, the farmers are happy, the poor ppl are sad, the construction owner is sad coz the work stopped, the construction workers are happy coz they get a holiday and sad coz they work on daily wages system and hence no earning for the day