The climate is hot-summer Mediterranean (Csa in the Köppen climate classification) near the boundaries of Csb and BSk, resulting from the high altitude and the distance from the coast. The average annual temperature is , with an average low in January of and an average high in July of . The annual precipitation range from 400 to 500 mm per year in the lower plains, and can reach above 1000 mm in the nearby mountainous area of Sierra de Guadarrama, as rainfall and snowfall is more frequent up the mountains. Decent showers coming from summer thunderstorms help the mountainous area of the province to be rainier than average than most of the central Spanish plateau, which gives the area lush vegetation. All of this make the province a damp corner in the context of the region. The predominant forms of vegetation in the mountainous areas include pine, evergreen, oak, beech and juniper.