December weather forecast
San Andrés, Colombia

Closing out the year, December in San Andrés brings cooler temperatures, with the lowest sea temperature of 28.1°C (82.6°F). However, this relatively "cool" period doesn't detract from the overall tropical experience, as the climate remains invitingly warm. The rains persist, maintaining the lush, green scenery, and the winds pick up slightly, offering refreshing breezes. As the year concludes, the island remains an attractive destination with its enduring tropical vibe.

Temperature

San Andrés signifies an average high-temperature of a still warm 27.9°C (82.2°F) in December, closely mirroring the 28.3°C (82.9°F) of November. An average low-temperature of 26.9°C (80.4°F), slightly less than the daytime peak, marks the month of December in San Andrés.

Heat index

For most parts of December, the heat index is evaluated at a tropical 32°C (89.6°F). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Remember that heat index calculations are made for conditions in the shade with light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

The average relative humidity in December is 78%.

Rainfall

In San Andrés, in December, during 27.5 rainfall days, 124mm (4.88") of precipitation is typically accumulated. In San Andrés, during the entire year, the rain falls for 276.2 days and collects up to 1366mm (53.78") of precipitation.

Sea temperature

In December, the average sea temperature is 28.1°C (82.6°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

With an average of 11h and 24min of daylight, December has the shortest days of the year in San Andrés, Colombia.
On the first day of December, sunrise is at 06:32 and sunset at 17:59. On the last day of the month, sunrise is at 06:48 and sunset at 18:12 -05.

Sunshine

The average sunshine in December is 7.5h.

UV index

The months with the highest UV index in San Andrés are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in San Andrés. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average UV index of 7 in December transforms into this advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take caution! The UV rays from the Sun gain strength from sand and water reflections.