December weather forecast
Cartagena, Colombia

December marks the cessation of the wet period, with a sharp decrease in rainfall to 38mm (1.5"). This turn gives way to a considerably drier climate, more in tune with the early months of the year. The temperatures recede, hovering around the same range as January. The sea temperature sees a considerable fall but remains warm enough for a swim. Cloud cover decreases significantly towards the end of the year, ensuring clear skies and encouraging tourism to prosper once again.

Temperature

Cartagena transitions into December recording an average high-temperature of a hot 30.5°C (86.9°F), closely aligning with the preceding month's temperature. Cartagena's nighttime temperatures in December see a subtle dip to an average of 26.1°C (79°F).

Heat index

The average heat index in December is calculated to be a torrid 38°C (100.4°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

The average relative humidity in December is 76%.

Rainfall

In December, in Cartagena, the rain falls for 11.5 days. Throughout December, 38mm (1.5") of precipitation is accumulated. In Cartagena, during the entire year, the rain falls for 210.6 days and collects up to 1115mm (43.9") of precipitation.

Sea temperature

In Cartagena, the average seawater temperature in December is 28.4°C (83.1°F).
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

The month with the shortest days in Cartagena is December, with an average of 11h and 30min of daylight.
On the first day of December in Cartagena, sunrise is at 06:04 and sunset at 17:38. On the last day of the month, sunrise is at 06:19 and sunset at 17:51 -05.

Sunshine

With an average of 7.4h of sunshine, December has the least sunshine of the year.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Cartagena, Colombia. The months with the lowest UV index in Cartagena are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: A daily high UV index of 7 in December leads to these guidelines:
Guard oneself from overexposure. Defence against sun injury is vital. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Warning! The reflection of sand and water increases the UV dose.