Colombia is close to the equator, so the average temperature does not change much throughout the year.
Although the climate in Colombia changes by the differences in altitude. From the hot lowlands to the cold snowy mountains of the Andes. Despite this difference Colombia has also a rainy season (winter) and a dry season (summer). The pattern of the two seasons varies in different regions.
Roughly you can say that October and April are the wettest months and December, January and February are the driest. We have taken this into account with the scheduling of our tours.