Last updated: August 23, 2025
In San Sebastian, Colombia, the average temperature in May is a mild 14°C (58°F). Expect lows of 8°C (47°F) and highs reaching up to 21°C (71°F). However, prepare for wet conditions as the area receives approximately 174 mm (6.9 in) of precipitation over 27 days. With an average humidity of 93%, it’s a month where you’ll feel that moisture in the air!
In May in San Sebastian, the average temperature is 14°C (58°F), with maximums reaching up to 21°C (71°F) and minimums dropping as low as 8°C (47°F). Pack accordingly for mild weather with some cool evenings, making it a great time for outdoor activities and explorations.
In San Sebastian in May, the precipitation amount is 174 mm (6.9 in) over the course of 27 days.
In San Sebastian in May, humidity is 93%. With an average temperature of 14°C (58°F), this humidity feels like a damp blanket enveloping you, making outdoor activities challenging and travel somewhat uncomfortable due to the heavy, moist air clinging to your skin.
In San Sebastian in May, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in San Sebastian.
UV Risk Categories
Weather in San Sebastian varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San Sebastian, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 14°C (57°F) | 150 mm (5.9 inches) | 72% | extreme |
| February Weather | 14°C (58°F) | 176 mm (6.9 inches) | 66% | extreme |
| March Weather | 14°C (58°F) | 211 mm (8.3 inches) | 74% | extreme |
| April Weather | 14°C (58°F) | 174 mm (6.9 inches) | 83% | extreme |
| May Weather | 14°C (58°F) | 174 mm (6.9 inches) | 93% | extreme |
| June Weather | 14°C (57°F) | 126 mm (4.9 inches) | 93% | extreme |
| July Weather | 13°C (56°F) | 89 mm (3.5 inches) | 84% | extreme |
| August Weather | 13°C (56°F) | 68 mm (2.7 inches) | 61% | extreme |
| September Weather | 14°C (57°F) | 62 mm (2.5 inches) | 53% | extreme |
| October Weather | 14°C (58°F) | 126 mm (5.0 inches) | 67% | extreme |
| November Weather | 14°C (58°F) | 211 mm (8.3 inches) | 78% | extreme |
| December Weather | 14°C (58°F) | 156 mm (6.2 inches) | 85% | extreme |