Humidity
There seems to be little to no correlation between humidity and Latitude as well as with cloudiness and Latitude. The scatter plot visualizations display a considerable amount of heterogeneity even at similar Latitudes. Basically, they're all over the map. However, a small grouping of cities exhibited abnormally low humity levels (at 0% humidity) in the Northern Hemisphere at around 60° to 75° Latitude.
Visualizations
