General:
* The forecast predicts a high chance of precipitation tomorrow, so bring an umbrella.
* Precipitation is essential for plant growth and the water cycle.
* The amount of precipitation in the area has been unusually low this year.
Specific Types:
* Precipitation can take many forms, including rain, snow, sleet, and hail.
* The precipitation was so heavy that the streets flooded.
* The mountain received a significant amount of precipitation in the form of snow.
Figurative:
* Her tears were a precipitation of her sadness. (This uses precipitation metaphorically to mean a sudden outpouring.)
Let me know if you'd like more examples, or have a specific context in mind!