How does the summer solstice affect the position of Hadley cells? I know that the solar equator is 23.5 degrees North, which differs from the 0 degrees (as a solar equator) for the equinox. For the equinox in the N. hemisphere, there are three Hadley cells, or cells of circulation. The range of each cell are as follows: one is 0 N - 30 N, one is 30 N -60 N, and the other is 60 N and above. What exactly are the cell ranges during the summer solstice? Thanks.