* Dew: Dew is water vapor that condenses on cool surfaces at night. It is not precipitation because it does not fall from the sky.

* Frost: Frost is water vapor that freezes on cool surfaces at night. It is not precipitation because it does not fall from the sky.

* Sleet: Sleet is a mixture of rain and snow that falls from the sky. It is not a non-example of precipitation because it does fall from the sky.

* Hail: Hail is frozen rain that falls from the sky. It is not a non-example of precipitation because it does fall from the sky.