The record I believe was at Eritrea a dew point of 94F and temperature 115F
What kind of climate hot and humid of course, pretty uncomfortable
The Dew point in Moorhead Minnesota once reached 88 which gives a ppm of around 47000 or 4.7%.
But other locations near the equator have dew points that frequently reach 86 F, so the Minnesota one is likely not the highest.
Edit:
The instance Kano mentions would be about 5.7%.
When you are talking about gases, % by volume is meaningless. All components of a gaseous mixture occupy 100% of the volume. The way that the proportion of a gas in a mixture is usually mole percent or percent by partial pressure, or much less commonly, mass percent.
For an ideal gas, mole percent and percent by partial pressure are the same. But, unless relative humidity is very low, water vapor is close to the conditions under which it condenses, and can not be considered to be an ideal gas, and mole percent and percent by partial pressure could be slightly different.
zippi
<"Recorded history" is an irrelevant term when the science that concludes that a recorded history of less than 150 years is relevant and also concludes that the planet is 300,000,000 times that amount!!!>
There is no reason to believe that the laws of physics changed 150 years ago. And you certainly don't know anything about the previous 4.5 billion years that scientists don't. Weather and climate were always about energy balances.
And 4.5 billion divided by 150 = 30,000,000
The average percentage of water as part of the air at sea level will be from 1% to 3%, but can be as high as 5%. The actual percentage depends upon the temperature and availability of water to evaporate. Dry air is actually heavier than moist air at any given temperature. Air at 30°C can hold about 30 grams of water per kilogram of air. At 20°C it can only hold about 17 grams, and at 10°C only about 9 grams.
Globally, I think the answer lurks here beneath the Obscurantia Nerdia which fails to bother to clearly label what is measured on the Y axis.
https://climatedataguide.ucar.edu/climat...
But your question is evidently asking about local maximum.
Out of googling time, sorry.
Do you have 4.5 billion years of intelligent-scientific-atmospheric information to really know what the "true" record is since we know from scientific investigational theories that the Planet is 4.5 billion years old?
Your intelligent question can only be justified with obvious and intelligent information.
You have none, it seems!
Only investigations! (That's what scientific theories are. Thoughts that are based on observances and opinions of those observances).
Your question has no facts to back it up so it is irrelevant!
"Recorded history" is an irrelevant term when the science that concludes that a recorded history of less than 150 years is relevant and also concludes that the planet is 300,000,000 times that amount!!!
This is precisely why science can't be trusted on any issue!
"Record" your own answer and it will be regarded as "Recorded History"?
That's what has precluded scientific history.
Answer: No bad day here! Just wondering why you think people have so much influence on weather-climate? It's been clearly stated by many (scientists) that CO2 levels (at their current levels) don't have much influence on weather-climate, yet you continue to push the issue.
Climate Un-Realist - 30,000,000 is accurate, but 300,000,000 sounds more drastic. Don't you think? That's what the IP CC is doing in their projections and have proven this every time they come out with a "new" report. They are "tweaking" their numbers to make it seem less obvious that they have "overstated" the reality of "Global Warming".
BTW - The Laws of Physics are always changing when it comes to science's interpretation of them just as the Constitution of the United States is subject to interpretation.
Water vapor depends on air temperature.
Water vapor makes up about 0.4% of the entire atmosphere by volume, while carbon dioxide is about one-tenth as large. Some places in the atmosphere it's much more humid than that, so what is the record highest percentage of water vapor in the atmosphere and where did it occur?
[This is NOT asking about relative humidity, by the way, which ranges from 0% to a little greater than 100%]
As a bonus question, what type of climate do they have in the location?
