# steaming breath, forehead, and hand

**URL:** <https://boards.straightdope.com/t/steaming-breath-forehead-and-hand/51870>\
**Category:** Factual Questions\
**Created:** [January 26, 2001, 3:56pm UTC](https://boards.straightdope.com/t/steaming-breath-forehead-and-hand/51870 "2001-01-26T15:56:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jb\_farley](https://avatars.discourse-cdn.com/v4/letter/j/9d8465/32.png) [@jb\_farley](https://boards.straightdope.com/u/jb_farley)\
**Post date:** [January 26, 2001, 3:56pm UTC](https://boards.straightdope.com/t/steaming-breath-forehead-and-hand/51870/1 "2001-01-26T15:56:03Z")

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what is the temperature differential necessary for water to visibly vapor off? that is, the temp of the water vs. the environment.

jb