than Spain's coastal regions, although there is year-round precipitation. Average annual precipitation is and the average annual relative humidity is 72%. In winter, temperatures very often (almost every day) drop below freezing, often reaching temperatures as low as , and snowfalls are common, while the summer months see average high temperatures of . The lowest recorded temperature in Burgos was on 20 January 1885. The highest recorded temperature was on 13 August 1987. Sights Burgos is rich in ancient churches and convents. The three most notable are the cathedral, with its chapel of the Condestables de Castilla (Lords Constable of Castile), the monastery of Las Huelgas and the Carthusian monastery of Miraflores. Minor notable churches are San Esteban, San Gil (Sancti Aegidii), San Pedro, San Cosme y San Damián, Santiago (Sancti Jacobi), San Lorenzo and San Lesmes (Adelelmi). The Convento de la Merced, occupied by the Jesuits, and the Hospital del Rey are also of historic and architectural interest. Among the other interesting architectural structures, in the walls of the city are the gateway of Santa María, erected for the first entrance of the Emperor Charles V, and the arch of Fernán González. Gothic Cathedral Construction on Burgos' Gothic Cathedral began in 1221 and spanned mainly from the 13th to 15th centuries. It has been declared a UNESCO World Heritage Site. The Cathedral is the resting place for El Cid (the famous knight from Medieval Spain's history) and his wife Dona Jimena. The west front is flanked by towers terminating in octagonal spires covered with open stonework traceries. The middle section, which serves as an entrance, has three alabaster pilasters, the intercolumnar spaces bearing panel-pictures representing the martyrdom of saints. The façade possesses ornate and fantastic surface decoration. The octagonal chapel of the Condestable, in florid, thus highly sculpted, Gothic design, has a roof finished with balustraded turrets, needle-pointed pinnacles and statues. In the lower portion, coats of arms, shields and crouching lions have been worked into the ensemble. The exterior of the sacristy is decorated with carved traceries, figures of angels and armoured knights. The elaborate tabernacle is composed of two octagonal sections in Corinthian style. Monasterio de las Huelgas The Monasterio de las Huelgas Reales (Monastery of the Royal Retreats) on the outskirts of the city, was founded in 1180 by king Alfonso VIII, and was begun in a pre-Gothic style, although almost every style has been introduced