One of the most attractive features of Colombia is the little-changing climate of its various regions. This is due to the nation's proximity to the equator, so the type of weather you want to enjoy during your vacation will wholly depend on location. If you're looking for a tropical vacation than the Caribbean coast and its 86°F average weather should be right up your alley. Ditto the Pacific coast region's similar climate. If you're looking for a fresh springlike weather than you'll enjoy Medellín and its surrounding Antioquia region.
If you travel south to Cali you'll find its tropical savanna climate and average high of 77°F lends itself to those sultry nights spent at local salsa clubs. On the other end of the spectrum, Bogotá is typically chillier due to its location high in the central Andes of the country. The rainy season in the capital lasts from April to October, so you might be treated to a little more precipitation if you visit the capital during this time.
Crowds & Costs
As mentioned, most of the summer vacationers from the northern hemisphere have gone home by September, so you can count on lower prices and fewer crowds.
Where to Go
All of Colombia can be your playground during the month of September, depending on your interests. If you have an eye for a jungle adventure you can head south to Leticia, the principal city in Colombia's Amazon region. There's no wet and dry season here but rather a high-water/low-water season, which denotes the water level of the Amazon River. Low-water season means the waterways are more easily navigable, there are better opportunities for wildlife spotting and all of the boat tours and excursions are available.
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What to Do
For beaches and wildlife spotting, consider making a trip to the northern Pacific Coast. This is Colombia's Chocó region, and September is a great month for whale-watching. Come to the coastal village of Nuqui, where you can spot humpback whales migrating south to the warmer waters of the equator. An added bonus to visiting Chocó in late September is the Fiesta de San Pacho (more info on this below). Read more tips about visiting the Chocó region here.
As mentioned, September is a great time for Amazon boat tours, and there's no bad time for city exploration and sightseeing in Medellín. It will still be rainy in Bogotá, but late September sees more clear days and visitors can check out the annual jazz festival.
Jazz al Parque. For a weekend in mid or late September, local and international musicians descend on Bogotá’s parks and treat audience members to various types of jazz, including instrumental and big band.
Fiesta de San Pacho. Every year in late September Chocó Department holds their own carnivalesque celebration, which usually lasts for a couple weeks or more. Ground zero for this celebration is in the Choco's principal city of Quibdó.
Traveling to Colombia in September? Check out these great itinerary ideas.
Colombia's Wild Pacific Coast. South America's undiscovered region of El Chocó on the Pacific Ocean takes center stage in this unique 10-day itinerary. Start in Medellín before flying to Bahía Solano to explore Utría National Park. Then on to Nuquí for canoeing, hiking, and soaking in hot springs, all the while looking for humpback whales and sea turtles close to shore.
Bogotá, Caño Cristales, & Highlands Tour. From June to November, the Guayabero River turns shades of rainbow colors in a vibrant natural display. Enjoy swimming holes and waterfalls before flying back to Bogotá, checking out a salt mine cathedral, and visiting Villa de Leyva, one of Colombia's most charming Spanish colonial villages.