https://www.chicagotribune.com/news/ct-xpm-2011-12-16-ct-wea-1216-asktom-20111216-story.html

Dec 16, 2011 ... The concept of zero percent relative humidity — air devoid of water vapor ... The world's lowest recorded relative humidity value occurred at ...

https://www.wunderground.com/cat6/world-record-low-humidity-116f-036-humidity-iran

On June 20, 2017, the temperature at Safi-Abad Dezful, Iran hit 115.7°F with a relative humidity of 0.3%. This may be a world record of the lowest humidity ever  ...

https://www.accuweather.com/en/weather-blogs/weathermatrix/las-vegas-sets-himidity-record-but-its-a-dry-heat/51705

Jun 28, 2011 ... At this time the relative humidity was 1%. The previous record dew point depression was 120 degrees set on July 2, 2007. This makes June 27, ...

https://en.wikipedia.org/wiki/Humidity

Humidity is the amount of water vapour present in air. Water vapour, the gaseous state of water, ... Relative humidity, expressed as a percentage, indicates a present state of absolute humidity relative to a .... The lowest recorded, and a record for North America, was set in April 2016 and given as 1 per cent and was in fact a ...

http://www.city-data.com/forum/weather/2786442-lowest-relative-humidity-ever-recorded.html

It apparently got down to 1% here this month, which would tie the world record, but then again, automated weather stations suck at accuracy ...

https://wgntv.com/2019/04/20/how-dry-i-am-chicago-set-record-for-all-time-lowest-humidity-breaking-85-year-old-record/

Apr 20, 2019 ... This broke the city's previous low humidity record of 13 percent, first set during the Dust Bowl on May ... Chicago sets record for all-time lowest humidity breaking 85-year old record ... Relative humidity and moisture in the air.

https://www.pbs.org/newshour/science/8-things-didnt-know-humidity

Jul 31, 2015 ... Weather scientists use the term “relative humidity,” which Joe Sobel, ... Saudi Arabia has the highest recorded dew point temperature. Humidity ...

https://www.currentresults.com/Weather-Extremes/US/low-humidity-cities.php

Las Vegas clearly ranks as the driest, with an average relative humidity level of just ... Humidity levels in these cities normally reach their lowest point for the day  ...

http://komonews.com/weather/scotts-weather-blog/1-humidity-hot-wind-nearly-sucks-all-the-water-out-of-the-air-in-california-desert

Aug 16, 2016 ... That made for relative humidity reading about as far as they can possibly go -- in ... I think set a world record for lowest humidity ever recorded.

https://www.weather.gov/lmk/humidity

Relative humidity (RH) (expressed as a percent) also measures water vapor, but ... Dewpoints as high as 80 or the lower 80s have been recorded, which is very ... majority of moisture in the atmosphere is contained roughly within the lowest ...