Global solar irradiation in north mexico city and some comparisons with the south

In North of Mexico City were measured the global-horizontal solar radiation from 1999 until 2012. Average radiations are disclosed for each of the months and annual averages with corresponding standard deviation. The solar irradiance data were recollected during fourteen consecutive years at the interval time of one minute. The used pyranometer was Yankee Environmental Systems, model TSP-1. The average annual radiation obtained during 14 years is 18.01 MJ/m(2) day, which is equivalent about to 5.0 kWh/m(2). The minimum average of 17.04 MJ/m(2) was found in the year 2002, and a maximum of 19.99 MJ/m(2) in 2011. For the specific month-based averages, the minimum value was recorded generally for December, with 14.90 MJ/m(2) and the maximum average for April, with 21.60 MJ/m(2). It will be also revealed the incident energy differences between the North-South geographical entities in Mexico City. The distance between the North and South sites are about 21.25 km.