September weather forecast
Mayumba, Gabon

September weather in Mayumba marks the gradual shift toward the rainy season. With September seeing an increase in the average rainfall, registering 45mm (1.77"), Mayumba begins its transition back to the moist season. Despite the change in the climate, the long daylight hours ensure ample time for outdoor pursuits. Catering to warm ocean swims, September sees an improvement in the sea temperature. Changes in local flora commence with the fresh showers, bringing a vibrancy that is typical of Gabon's resplendent natural scenery.

Temperature

Mayumba registers an average high-temperature of a still warm 26.6°C (79.9°F) with the arrival of September, showing minor deviation from the preceding month. Mayumba's temperature tends to fall to an average low of 21.3°C (70.3°F) during the nights of September.

Humidity

In Mayumba, the average relative humidity in September is 85%.

Rainfall

In Mayumba, during September, the rain falls for 13.9 days and regularly aggregates up to 45mm (1.77") of precipitation. In Mayumba, during the entire year, the rain falls for 124.6 days and collects up to 1673mm (65.87") of precipitation.

Sea temperature

In Mayumba, in September, the average water temperature is 24.3°C (75.7°F).
Note: Swimming in 24.3°C (75.7°F) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 25°C (77°F) and 28°C (82.4°F).)

Daylight

In Mayumba, the average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 06:15 and sunset at 18:18. On the last day of September, in Mayumba, sunrise is at 06:03 and sunset at 18:11 WAT.

Sunshine

August and September, with an average of 2h of sunshine, are months with the least sunshine in Mayumba.

UV index

The months with the highest UV index are January through April, August through December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unsafe exposure to UV radiation for average individuals.
Note: A typical high UV index of 12 in September suggests the following recommendations:
Execute all crucial precautions. Warding off sun exposure is non-negotiable. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. After a swim or an outdoor workout, generously apply and regularly reapply a sunscreen with at least SPF 30, even if the day is cloudy. Attention! The reflection of both water and sand can increase the intensity of UV rays.