Equatorial Weather Analysis - Humidity:

There is a dense collection of cities near or at 100% humidity very close to 0 deg latitude (equator). Very few cities between the equator and Tropic of Cancer have humidity levels below 60%. Cities outside of that range show a broader diversity of humidity levels between 0 and 100%.

Note: There were two cities that indicated humidity levels over 100%. These were discarded.

Visualizations
Temperature chart
Humidity chart
Cloudiness chart
Wind chart