and an average annual temperature of 28 °C. Temperatures can rise as high as 34 °C in the month of June, and a minimum of 0 °C has been reached in the months of December and January. However, in the northeastern zone the climate varies to semi-dry with a temperature predominantly in excess of 28 °C. Precipitation varies between 600 and 800 millimeters per year. Economy Silao is a center of agricultural and industrial activity in the area, with a wide variety of farm crops, produce and dairy packing plants. A General Motors truck and SUV assembly plant which as of 2016 makes one third of Chevrolet and GMC Full-size Pickups. Volkswagen has an engine plant, and Pirelli makes tires. Population According to the results presented by the second 'Conteo de Población y Vivienda' (census) of 2005, the municipality counts a total of 147,123 inhabitants. Ethnic Groups The indigenous population of Silao is limited to 203 inhabitants that represent 0.15% of the total municipal population. The principal native languages are Mazahua and Nahuatl. According to the second 'Conteo de Población y Vivienda' (Census) of 2005, there are a total of 187 persons who speak some indigenous language. The municipality has a density of 250 persons per square kilometer and an average population increase of 1.6%. Religion 95.8% of the population of Silao (as of 2000) are Roman Catholic. Approximately 1.8% are Protestants and Evangelicals, and 1.4% are other religions. The last 1% either stated they don't have a religion or it wasn't specified. Historic Monuments Parroquia de Santiago Apóstol, construction was started in the end of the 17th century and ended in the year 1728. Its style is neo-classical. Templo del Santuario, constructed at the end of the 17th century. Templo de la Casa de Ejercicios, built in 1834. Palacio Municipal, formerly functioned as city jail and headquarters. Mercado González Ortega, main market in Silao. Monument to Cristo Rey (Christ the King), started construction on December 10, 1945, and completed on August 17, 1949. The monument itself stands 20 meters from foot to head and is in the 'cerro del Cubilete', which is considered the geographic center of the country of Mexico. Casa de Mauricio Ruiz, historic house, home of the Mexican artist Mauricio Ruiz Chávez Tourist attractions Some of the attractions in Silao are: Here one can find the Cerro del Cubilete, considered by some to be the geographic