May weather forecast
Libreville, Gabon

May, the last month of the spring in Libreville, is also a moderately hot month, with an average temperature varying between 24.7°C (76.5°F) and 28.9°C (84°F).

Temperature

In May, the average high-temperature is practically the same as in April - a still moderately hot 28.9°C (84°F). In May, in Libreville, the average low-temperature is 24.7°C (76.5°F).

Heat index

The average heat index in May is calculated to be a torrid 36°C (96.8°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In May, the average relative humidity in Libreville is 85%.

Rainfall

In Libreville, it is raining for 25.8 days, with typically 156mm (6.14") of accumulated precipitation. Throughout the year, in Libreville, there are 274.1 rainfall days, and 1477mm (58.15") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature in Libreville is 27.6°C (81.7°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Libreville, the average length of the day in May is 12h and 8min.
On the first day of May, sunrise is at 06:15 and sunset at 18:23. On the last day of the month, sunrise is at 06:15 and sunset at 18:24 WAT.

Sunshine

In May, the average sunshine in Libreville is 7.2h.

UV index

January through May, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.