Colombia - weather in September

In September, the rains increase in the northern part of Colombia, because the sun passes at its zenith at noon during the month, proceeding from north to south, and increases heating and evaporation. In the northern part, in the Caribbean Sea, it is still summer, and the rains increase further compared to the previous months, both on the islands to the north (San Andrés and Providencia), and on the coast (see Barranquilla , Cartagena, Santa Marta, Riohacha), and the risk of hurricanes increases as well.
In the central-northern part of the Andes (see Bogota, Cali, Medellín), the second rainy season begins, after the relatively dry period from June to August. However, the rains are not abundant in the more sheltered areas, which are located between the two cordilleras (see Bogotá, Neiva) or are protected by the mountains (see Cali).
In the southern part of the Amazon forest (see Leticia), which is located south of the Equator, winter is over and the rains, which in any case had never stopped falling, start to increase again. Instead, in the southern part of the Pacific coast (see Tumaco), we are in the least rainy period, which goes from August to November (even though, during El Niño periods, this area also remains rainy, while during those of La Niña, it becomes decidedly dry).
The rains, on the other hand, begin to decrease in the east, in the savannah area called Llanos (see Arauca, Puerto Carreño, San José del Guaviare), although they are still abundant. In this inland area, and also between the cordilleras at two low altitude (see Tatacoa desert), but also in the arid peninsula of La Guajira, it can get very hot, with peaks of 38 °C (100 °F) and more.
Temperatures in Colombia vary little over the months, and at low altitudes it is hot all year round, while in the Andes, the temperature decreases with altitude.

The sea in Colombia is warm enough for swimming all year round, both in the north (Caribbean Sea) and in the west (Pacific Ocean).

The following tables show the climate averages in the month of september in Colombia in a selection of locations.

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Monthly climate averages - September

(from north to south)























See also: Colombia, the weather in August - October
The climate of Colombia