Average temperatures in Cartagena in September
Consistent with the city's tropical climate, which maintains relatively steady temperatures around the year, the weather in Cartagena in September heralds an average daily high of 31°C (88°F).
At night, the temperature typically cools down to around 25°C (77°F) — a range that’s on par with August.
As highlighted above, September sits in the heart of the region’s wet season. In fact, it’s one of the wettest months of the year in Cartagena and sees an average of 200mm (7.9 inches) across the month.
For wider context, August sees an average of 113mm (4.45 inches), and October experiences around 206mm (8.11 inches). Meanwhile, the dry season months of January, February, and March see a mere 1mm (0.04 inches).
Considering the typical rain patterns, and the fact that temperatures are cooler in the mornings and evenings, plan outdoor activities during those times, and set aside the rain-prone afternoons for indoor experiences. Oh, and be sure to bring a brolly and light raincoat.
Editor’s tip: for a bigger picture of the weather, read up on the best time to visit Colombia.
What about the crowds and cost?
As is usually the case in destinations that are subject to tropical rainy season conditions, September is a low-season month for tourism in Cartagena.
As a result of the reduced demand for flights, accommodation, and tour services, you can expect crowds to be small, and costs to be lower.
For context, Cartagena’s high season runs from December to January, with an additional mini-peak seen around Semana Santa (Easter week). Both these periods see an increase in the average cost of flights and accommodation.
If you’re looking to balance moderate rain with moderate crowds and costs, you might be better off visiting during the February-April or late-November to early December shoulder seasons.
That’s especially the case if enjoying the area’s adventure activities is top of your wish list — September’s rain might hamper some of your plans.
Meanwhile, bargain hunters, culture vultures, and lovers of tropical conditions shouldn’t be too quick to disregard September.
Still not sure where to go? Discover some of the best places to visit in September.