May weather forecast
Porto Novo, Benin

May is marked by a significant break in temperature trends as Porto Novo begins experiencing slightly cooler weather, particularly when compared to April. In this time, the city experiences up to 40mm (1.57") of rainfall, a substantial increase that signifies the beginning of the rainy season. Wind speeds remain relatively steady, while the hours of sunshine decrease slightly, consistent with the onset of the wetter season. With an anticipation of extended rainfall, June follows this cooler and wetter trend even more substantively.

Temperature

In the transition from April to May, Porto Novo reports an average high-temperature of a still hot 32.5°C (90.5°F), indicating a close resemblance to the prior month. Porto Novo observes an average low-temperature of 26.3°C (79.3°F) during May nights.

Heat index

Throughout May, the heat index is evaluated at an extremely hot 44°C (111.2°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', embodies the combination of air temperature and moisture content to illustrate perceived heat. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In Porto Novo, the average relative humidity in May is 75%.

Rainfall

In Porto Novo, in May, it is raining for 12.1 days, with typically 40mm (1.57") of accumulated precipitation. Throughout the year, there are 148.7 rainfall days, and 481mm (18.94") of precipitation is accumulated.

Daylight

In Porto Novo, the average length of the day in May is 12h and 25min.
On the first day of May, sunrise is at 06:35 and sunset at 18:57. On the last day of the month, sunrise is at 06:33 and sunset at 19:01 WAT.

Sunshine

In May, the average sunshine is 8.5h.

UV index

The months with the highest UV index in Porto Novo, Benin, are January through May, August, October through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 7 during May leads to these instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.