How is humidity measured?

[nec1912]

How is humidity measured? The higher the number more humidity? And lower the number less humidity?

It say humidity New York City July Average relative humidity (%) 64.2

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

Los Angeles July Average relative humidity (%) 76.6

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

Chicago July Average relative humidity (%) 68.5

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

Vancouver July Average relative humidity (%) 61.4

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

Detroit July Average relative humidity (%) 68.5

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

Chicago July Average relative humidity (%) 68.5

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

Dallas July Average relative humidity (%) 59.8

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

Houston July Average relative humidity (%) 74.6

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

Kansas City July Average relative humidity (%)67.4

https://en.wikipedia.org/wiki/Kansas_City,_Missouri

Atlanta July Average relative humidity (%) 74.4

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

Miami July Average relative humidity (%) 74.8

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

Honolulu in Hawaii July Average relative humidity (%) 64.6

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

Or is there better and other way measure humidity?

Miami humidity is worse than New York or Detroit humidity in the summer.

Likewise Miami is worse than Dallas or Houston the humidity in the summer.