Areas south of the twenty-fourth parallel with elevations up to 1,000 meters (the southern parts of both coastal plains as well as the Yucatán Peninsula), have a yearly median temperature between 24°C and 28°C. Temperatures here remain high throughout the year, with only a 5°C difference between winter and summer median temperatures. Although low-lying areas north of the twentieth-fourth parallel are hot and humid during the summer, they generally have lower yearly temperature averages (from 20°C to 24°C) because of more moderate conditions during the winter.
Many large cities in Mexico are located in the Valley of Mexico or in adjacent valleys with altitudes generally above 2,000m, this gives them a year-round temperate climate with yearly temperature averages (from 16°C to 18°C) and cool nighttime temperatures throughout the year. Many parts of Mexico, particularly the north have a dry climate with sporadic rainfall while parts of the tropical lowlands in the south average more than 200cm of annual precipitation.
