April weather forecast
Cartagena, Colombia

As the calendar flips to April, Cartagena experiences drastic changes in weather. April marks the transition from the dry to the wet season. The most noticeable characteristic is the sharp rise in rainfall to 50mm (1.97"), ushering in a noticeably wetter period. Despite the increased cloud cover and rainfall, the amount of sunshine remains relatively high providing pleasant daylight hours for outdoor activities. Sea temperatures remain steady, guaranteeing the possibility of water-based tourism.

Temperature

The arrival of April sees an average high-temperature of a still hot 31°C (87.8°F), identical to March. Night temperatures in April in Cartagena exhibit a subtle decrease, settling at an average of 26.8°C (80.2°F).

Heat index

The heat index value for April is calculated to be a blistering 40°C (104°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In April, the average relative humidity is 76%.

Rainfall

In Cartagena, during April, the rain falls for 17 days and regularly aggregates up to 50mm (1.97") of precipitation. Throughout the year, there are 210.6 rainfall days, and 1115mm (43.9") of precipitation is accumulated.

Sea temperature

In Cartagena, the average seawater temperature in April is 27.8°C (82°F).
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

The average length of the day in April is 12h and 22min.
On the first day of the month, sunrise is at 05:58 and sunset at 18:12. On the last day of April, sunrise is at 05:44 and sunset at 18:13 -05.

Sunshine

April has the most sunshine of the year in Cartagena, with an average of 11.3h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Cartagena. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A typical high UV index of 7 in April suggests the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.