The 18th parallel north is a circle of latitude that is 18 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, Central America, the Caribbean and the Atlantic Ocean.
At this latitude the sun is visible for 13 hours, 13 minutes during the summer solstice and 11 hours, 3 minutes during the winter solstice.
18th parallel north Wikipedia
Starting at the Prime Meridian and heading eastwards, the parallel 18° north passes through: