In the high Andes the temperature depends on the sun. When the sun is out it can be pleasantly warm, but if the clouds cover the sun or you pass through the shadow of a tall building, the temperature will drop quickly and dramatically. Nights are quite cold. Plan to have layers of clothes which you may remove or put on as needed. In the lowlands and Amazon Jungle, it is almost always warm and humid.
Despite Bolivia’s varying climatic conditions, there are two distinct seasons:
- The dry season (winter) is generally from May to October
Some characteristics of the dry season include:
- Days are slightly shorter but usually sunny.
- Nights are colder especially in the highlands during June and July.
- Temperatures are less humid and more pleasant in the lowlands, however rain remains a possibility year round.
- A few times a year, usually between May and August, cold fronts coming up from Patagonia sweep the country sending temperatures plummeting, even in the Amazon.
The rainy season (summer) is generally from November to March.
Some characteristics of rainy season include:
- Days tend to be warm and humid in the east, mild in the south and dry in the west.
- In the highlands evenings are especially pleasant.
- Heavy rains are more prominent in the lowlands, causing huge areas to flood and become muddy, along with
- an increase in heat, humidity and mosquitoes.
- The highlands are less affected by rain, however tracks do get muddy and cloudy days are more common.