Colombia is close to the Equator which means the climate is tropical with very little change in seasons. Temperatures are the same throughout the year with the only change the amount of precipitation a certain area receives. These changes are related to elevation as well as a convergence of air masses that cross the country.
The average rainfall in Colombia is around 100 inches per year and the atmosphere is much like a tropical rain forest. There are one or two dry months but there is still enough rain to support tropical vegetative growth.
The driest season in Colombia is between November and April and the wet season is from May to October. The best time to visit is between December through March.
The most widely used transportation in Colombia is by public bus. In most of the country, you can stop any bus that passes, paying when you board. It is recommended that female passengers ride on the aisle seats to avoid harassment. Although it does not happen often, it does on occasion and others will step in to help should a female feel uncomfortable as long as they can see what is happening.
There are also van services that are smaller and often arrive faster. This is especially true between Pereira and Medellin where a van can reduce the ride time by an hour.
Taxis are also popular in Colombia with some cities offering bicycle taxis. There may also be water and motorcycle taxis but avoid the latter as they travel at high speeds and are known for having accidents. Never get in a taxi whose license plate does not coincide with the town you are in. For instance, all taxis in Bogata will have the word on the bottom of the license plate. In some towns, hotels also offer shuttles as taxis can be expensive.
Small planes are also an option for transportation in Colombia. Flights from Bogota to Pereira can be as low as $50 if you plan ahead.
Some areas of the country can only be reached by boat, including Nuqui and Providencia Island. Book boating transportation at least two weeks in advance as well as any lodging you may need as the accommodations fill quickly. When you arrive, talk to the hotel about shuttle options as many do not have an online presence.