Last updated: August 23, 2025
In San Carlos, Colombia, the average temperature in September hovers around 22°C (73°F), offering a pleasant climate for visitors. Expect minimum temperatures to dip to 16°C (61°F) and can soar up to 33°C (91°F) on warmer days. However, be prepared for some rain, as precipitation amounts reach 208 mm (8.2 in) over approximately 25 days of the month. With an average humidity of 88%, the air can feel quite moist, adding to the tropical ambiance of this beautiful destination.
In September in San Carlos, the average temperature is 22°C (73°F). Maximums can reach 33°C (91°F), while minimums can drop to as low as 16°C (61°F). This pleasant weather makes it an ideal time for outdoor adventures and sightseeing.
In San Carlos in September, the total precipitation amount is 208 mm (8.2 in) recorded over a span of 25 days.
In San Carlos in September humidity is 88%. With an average temperature of 22°C (73°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor adventures a sweaty endeavor and prompting frequent breaks for hydration and shade.
In San Carlos in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Carlos, you can check here.
UV Risk Categories
Weather in San Carlos varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Carlos, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (71°F) | 94 mm (3.7 inches) | 74% | extreme |
| February Weather | 22°C (72°F) | 96 mm (3.8 inches) | 68% | extreme |
| March Weather | 22°C (72°F) | 225 mm (8.9 inches) | 65% | extreme |
| April Weather | 22°C (72°F) | 260 mm (10.2 inches) | 73% | extreme |
| May Weather | 22°C (72°F) | 283 mm (11.1 inches) | 88% | extreme |
| June Weather | 22°C (73°F) | 152 mm (6.0 inches) | 89% | extreme |
| July Weather | 23°C (74°F) | 98 mm (3.9 inches) | 89% | extreme |
| August Weather | 23°C (73°F) | 128 mm (5.1 inches) | 87% | extreme |
| September Weather | 22°C (73°F) | 208 mm (8.2 inches) | 88% | extreme |
| October Weather | 22°C (71°F) | 285 mm (11.2 inches) | 89% | extreme |
| November Weather | 21°C (71°F) | 379 mm (14.9 inches) | 90% | extreme |
| December Weather | 22°C (71°F) | 135 mm (5.3 inches) | 85% | extreme |