April weather forecast
Cotonou, Benin

In April, the city of Cotonou experiences a blend of high temperatures and remarkable precipitation levels. While the average high and low temperatures stay constant, this month marks the most prolonged daylight duration of 12.3 hours. Reflecting on the tempestuous conditions, April's precipitation reaches a record high of 137mm (5.39"), characterizing it as an exceptionally wet month in the city's climate history. Despite having this peak rainfall level, the UV index remains at 12 units and there is no significant change in sea temperature. This month thus combines a warm climate with an increased frequency of rainfall.

Temperature

At the onset of April, Cotonou records an average high-temperature of a still hot 31.6°C (88.9°F), showing little deviation from the preceding month. An average low-temperature of 25.6°C (78.1°F) is common in Cotonou during the nights of April.

Heat index

The heat index value for April is calculated to be a blistering 42°C (107.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

April is the least humid month in Cotonou, with an average relative humidity of 76.5%.

Rainfall

In Cotonou, in April, during 7 rainfall days, 137mm (5.39") of precipitation is typically accumulated. Throughout the year, there are 75 rainfall days, and 1308mm (51.5") of precipitation is accumulated.

Sea temperature

March through May and November, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.

Daylight

In April, the average length of the day is 12h and 16min.
On the first day of April, sunrise is at 06:48 and sunset at 18:59. On the last day of the month, sunrise is at 06:37 and sunset at 18:57 WAT.

Sunshine

The average sunshine in April is 7.3h.

UV index

The months with the highest UV index are February through May, August through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 12 during April, leads to the following recommendations:
Carry out all important precautions, unprotected skin could get burns in no time. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Apply generously and frequently reapply a sunscreen with SPF 30 or more even on cloudy days, particularly after a swim or outdoor exercise. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.