Further west, the Altiplano is a plateau at 3,000 m to 4,000 m above sea level. The climate is arid and cold: high temperatures vary little (since the warmer season is cloudy, and the coolest is sunny), ranging from 14 °C to 21 °C (57F to 70F); night temperatures go from 6 °C (43F) in midsummer, to -8 °C (18F) in midwinter, and extremes under -15 °C (5F) might be recorded. All rain falls exclusively in the summer, with values between 200 mm and 400 mm in total. Several salt flats exist in this area.