Being close to the Equator, the climate of Colombia is rather uniform. The dry season lasts from December to March and should be preferred to avoid visiting Colombia in the rain. The wet season lasts from April to November, with very heavy rainfall. You should adapt your trip to these variations, as well as to the differences between the different regions: a tropical, and therefore very wet, climate in Amazonia, a harsher climate in the mountains and semi-desert in the Guajira. You should also avoid the weeks between mid-December and mid-January throughout country: they are very crowded with Colombian holidaymakers.