Humidity varies among cities even at the same Latitude. One thing to notice is there is variance in humidity that tends to decrease at certain latitudes, such as from -20 degrees to 0 degrees latitude and at around 40 degrees to approximately 75 degrees latitude. As latitude decreases from that range of latitudes, such clusters become more rare while common for the northern hemisphere. Use the navigation bar or click the images in the visualizations below for more graphs and analyses.