Last updated: August 23, 2025
In December, the average temperature in San Marcos, Colombia is a warm 28°C (83°F), making it an inviting destination for travelers. Expect temperatures to range from a comfortable 23°C (73°F) to a sizzling 35°C (95°F). However, don't forget your umbrella, as precipitation averages 64 mm (2.5 in) over about 15 days. Be prepared for some humidity too, with an average of around 80%!
In December in San Marcos, the average temperature is 28°C (83°F), with maximums reaching 35°C (95°F) and minimums dropping to as low as 23°C (73°F). This warm climate makes San Marcos an ideal destination for sun-seekers and outdoor enthusiasts.
In San Marcos in December, the precipitation amount is 64 mm (2.5 in), occurring over the span of 15 days.
In San Marcos in December, humidity is 80%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping you, making travel feel sluggish and sticky, as every movement generates a sheen of perspiration that clings to your skin.
In San Marcos in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Marcos.
UV Risk Categories
Weather in San Marcos varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Marcos, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 29°C (84°F) | 27 mm (1.1 inches) | 70% | extreme |
| February Weather | 30°C (87°F) | 6 mm (0.2 inches) | 67% | extreme |
| March Weather | 30°C (86°F) | 48 mm (1.9 inches) | 65% | extreme |
| April Weather | 29°C (84°F) | 150 mm (5.9 inches) | 67% | extreme |
| May Weather | 28°C (83°F) | 259 mm (10.2 inches) | 79% | extreme |
| June Weather | 28°C (83°F) | 229 mm (9.0 inches) | 87% | extreme |
| July Weather | 28°C (83°F) | 198 mm (7.8 inches) | 88% | extreme |
| August Weather | 28°C (83°F) | 209 mm (8.2 inches) | 87% | extreme |
| September Weather | 28°C (82°F) | 209 mm (8.2 inches) | 87% | extreme |
| October Weather | 27°C (82°F) | 214 mm (8.4 inches) | 86% | extreme |
| November Weather | 28°C (82°F) | 186 mm (7.3 inches) | 86% | extreme |
| December Weather | 28°C (83°F) | 64 mm (2.5 inches) | 80% | very high |