September weather forecast
Djerba, Tunisia

September ushers in a slow retreat from the peak summer conditions, with the average temperature in Djerba declining to 28.2°C (82.8°F). The primary change observed in the weather is in the form of increased rainfall, peaking to 10mm (0.39") compared to the negligible rain of August. The length of day reduces to 12.4 hours, and the wind speed picks up, averaging at 18.8km/h (11.7mph). Maintaining the tropical ambiance of August, the sea temperature remains relatively high at 27°C (80.6°F). This climatic blend of warm days and cool evenings in Djerba accents the city's cultural allure, captivating the visitors' senses.

Temperature

September's advent in Djerba denotes a minor fluctuation in the average high-temperature to a still warm 28.2°C (82.8°F) from August's 29.7°C (85.5°F). Djerba documents an average low-temperature of 25.9°C (78.6°F) for the nights of September.

Heat index

For most parts of September, the heat index is evaluated at a tropical 31°C (87.8°F). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.
Heat index specifics point out values are for conditions of shade and a slight breeze. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

In September, the average relative humidity in Djerba is 66%.

Rainfall

In Djerba, in September, during 5.5 rainfall days, 10mm (0.39") of precipitation is typically accumulated. Throughout the year, in Djerba, there are 65.5 rainfall days, and 175mm (6.89") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 27°C (80.6°F).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 25°C (77°F) to 29°C (84.2°F) is very pleasurable for extended periods, without any discomfort.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of September, sunrise is at 05:50 and sunset at 18:42. On the last day of the month, sunrise is at 06:10 and sunset at 18:02 CET.

Sunshine

The average sunshine in September is 10.7h.

UV index

The months with the highest UV index in Djerba are June through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Caution! Sand and water reflections can notably increase the UV radiation intensity.