There three main types of climate. The first is temperate and humid, with rains in the summer and an average annual temperature of between 12 and 18C. There is little rain in the winter but the annual average is about 850mm. This climate prevails at altitudes over 2,000 masl. There is a semi hot and dry climate in areas with average annual temperatures between 18 and 22C with rains in the summer and little rain in winter. Average annual precipitation is about 500mm. Areas with a semi hot and humid climates have similar rainfall patterns but with an average rainfall of just under 1000mm. Summers here are hot and humid. Like in the rest of the Sierra Gorda, the coldest temperatures occur between December and January, with high temperatures in April and May. In the highest elevations, many of which are in Pinal de Amoles, frosts, freezes and even snow are not uncommon. Recent significant freezes, frosts and snows have occurred in 2007 and 2010 with very high altitude communities such as San Gaspar most affected. The ice and snow make driving dangerous on Highway 120, as it has an abundance of curves. This can form “black ice” which is an invisible layer of ice over the earth, which can lower air temperatures further. The government works to help poorer communities deal with the cold conditions year with advisories. In 2010, the Sierra Gorda had it first significant snowfall in eighteen years in the municipality, with temperatures of -4C. In some places, the cover was 15 cm deep.