September weather forecast and climate
Bonny, Nigeria

The first month of the autumn, September, is also a moderately hot month in Bonny, Nigeria, with average temperature ranging between max 27.3°C (81.1°F) and min 23.8°C (74.8°F).

Temperature

In Bonny, the average high-temperature is relatively the same as in August - a still moderately hot 27.3°C (81.1°F). In September, in Bonny, the average low-temperature is 23.8°C (74.8°F).

Heat index

The average heat index is appraised at a hot 31°C (87.8°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, wind). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in September is 85%.

Rainfall

In Bonny, during 28.4 rainfall days, 263mm (10.35") of precipitation is typically accumulated. In Bonny, during the entire year, the rain falls for 300.7 days and collects up to 1894mm (74.57") of precipitation.

Sea temperature

In Bonny, in September, the average water temperature is 26.8°C (80.2°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In September, the average length of the day in Bonny, Nigeria, is 12.1h.

Sunshine

In Bonny, Nigeria, the average sunshine is 5.6h.

UV index

Months with the lowest UV index in Bonny are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in September transform into the following instructions:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.