, Research Editor. 89 /. CST (Central Standard Time uTC/GMT -6 hours, apr 7, 2019. The capital, the city of San Luis Potosí, is located History at your fingertips Sign up here to see what happened On This Day, every day in your inbox! Bomberos Oriente - 721.93.33, cruz Roja - 713.00.88 / 707.01.40. Most settlements are in the cool, moist highlands in the eastern part of the state, including the capital city. 84 / 50 F, weather by CustomWeather, 2019, sun in South: 12:56.