The weather in La Paz Bolivia is cool to warm year-round but rarely gets extremely hot. It's also fairly arid, except during the rainy season. Because La Paz is built inside a deep and very wide gorge shaped somewhat like a bowl, with it's city center at 3650 meters above sea level and it's Zona Sur (southern end) at only 3300 masl, differences in temperature can be felt in various zones of the city. High above the city center at 4082 masl is the city of El Alto where the La Paz International airport is located.
Because the city is surrounded by mountains, the sun drops behind them fairly early in the evening and temperatures drop dramatically overnight. During the summer (December through March, also the rainy season) the average temperature is 72ºF (22ºC). During the winter (June-August, the dry sunny season) temperatures drop to an average of 59ºF (15ºC).