September weather forecast
Calabar, Nigeria

September heralds a gradual retreat of the wet season in Calabar. Despite a decrease in rainfall to 270mm (10.63"), the city braces for high humidity of 87%. As the mercury inches upwards, the city slowly begins transitioning towards hotter days. Although rainfall remains high, it is the dwindling showers of the outgoing wet season that profoundly mark the Weather in September.

Temperature

September's onset in Calabar, Nigeria, sees an average high-temperature of a still moderately hot 29°C (84.2°F), exhibiting a slight fluctuation from the previous month. In Calabar, the nighttime temperature averages to an agreeable 22.7°C (72.9°F) during September.

Heat index

September's mean heat index is calculated to be a fiery hot 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. 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 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The months with the highest humidity in Calabar are July through September, with an average relative humidity of 87%.

Rainfall

In September, in Calabar, the rain falls for 28.6 days. Throughout September, 270mm (10.63") of precipitation is accumulated. In Calabar, Nigeria, during the entire year, the rain falls for 287.4 days and collects up to 1897mm (74.69") of precipitation.

Sea temperature

In Calabar, the average seawater temperature in September is 26.8°C (80.2°F).
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

In Calabar, Nigeria, the average length of the day in September is 12h and 9min.
On the first day of September, sunrise is at 06:20 and sunset at 18:32. On the last day of the month, sunrise is at 06:14 and sunset at 18:18 WAT.

Sunshine

The average sunshine in September in Calabar, Nigeria, is 5.2h.

UV index

June through September, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum UV index of 6 in September translates into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Warning! Sand and water reflections boost the intensity of UV exposure.