September weather forecast
Porto Novo, Benin

In September, after the highs of the rainy season, Porto Novo commences its transition to warmer and drier conditions. The rainfall escalates back to 64mm (2.52") spread over 19 days while temperatures start getting back to around 29.5°C (85.1°F). Despite the uptick in temperature, residents can breathe easy as the heat is still considerably mild when viewed in the wider context of the city's climate. The relief from excessive rainfall leads into October when rainfall recedes, and warmer temperatures resume.

Temperature

September in Porto Novo denotes a minimal variation in the average high-temperature to a still moderately hot 29.5°C (85.1°F) from August's 28.7°C (83.7°F). An average low-temperature of 23.9°C (75°F) is observed during September nights in Porto Novo.

Heat index

Throughout September, the heat index is evaluated at a torrid 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

July through September, with an average relative humidity of 81%, are the most humid months in Porto Novo.

Rainfall

In September, the rain falls for 19 days. Throughout September, 64mm (2.52") of precipitation is accumulated. In Porto Novo, during the entire year, the rain falls for 148.7 days and collects up to 481mm (18.94") of precipitation.

Daylight

In Porto Novo, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:42 and sunset at 18:56. On the last day of September, sunrise is at 06:37 and sunset at 18:41 WAT.

Sunshine

In Porto Novo, the average sunshine in September is 6.3h.

UV index

June, July and September, with an average maximum UV index of 6, are months with the lowest UV index in Porto Novo. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A daily maximum UV index of 6 in September translates into the following instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.