Frosty breath

[ghostlymoron]

Here's a simple question (for you clever bods). What temperature does it have to be for your breath to show as 'steam'.

 

[Lakesailor]

I think it will also depend on the relative humidity. Vapour is probably a better word, although someone else may have a more precise term.

 

[gordmac]

Would think pressure would make a difference.

 

[Momac]

According to the interweb....................

The humidity of our breath is typically 100% for all practical purposes so it becomes a matter of the temperature. This can vary depending on the dryness of the air but if the air is fairly humid, that is above 80% RH your breath can be seen at 9.2 C. If the air is very dry, less than 20%, then it requires a cooler temperature near 5.5 C.

 

[oldsaltoz]

Almost midnight here and still 31*C, but I can see the slight wisp of mist when I open the freezer for more ice.

Good luck and fair winds.

 

[ghostlymoron]

Almost midnight here and still 31*C, but I can see the slight wisp of mist when I open the freezer for more ice.

Good luck and fair winds.

Bah humbug. Thanks for the useful answers.

 

[gordmac]

Almost midnight here and still 31*C, but I can see the slight wisp of mist when I open the freezer for more ice.

Good luck and fair winds.

31c that sounds unpleasant, I would prefer a bit of cold to that I think.

 

[William_H]

Almost midnight here and still 31*C, but I can see the slight wisp of mist when I open the freezer for more ice.

Good luck and fair winds.

Ah Brian it is a bit like poking a grumpy bear with a sharp stick mentioning Ozzie weather on this forum. olewill

 

[macd]

Vapour is probably a better word, although someone else may have a more precise term.

Not sure there is one in everyday use, although condensate would do (clumsily). Water vapour, like steam, is invisible.