September weather forecast
Annaba, Algeria

September arouses a gentle adieu to the scorching summer with a slight drop in temperatures compared to August's high. The sea temperature starts a gradual descent, measuring a slight reduction to 25°C (77°F). September carries the remnants of the summer warmth, dressed in the beginnings of an autumn chill. The arrival of autumn adorns the scenic beauty of Annaba with a russet tinge. Gently ushering the city from the luxuriant warmth, September narrates a subtle tale of changing seasons.

Temperature

The transition into September in Annaba is accompanied by a slight temperature decrease, with the average high-temperature shifting from a tropical 30.3°C (86.5°F) in August to a warm 27.1°C (80.8°F). The average nighttime temperature lowers to an agreeable 21°C (69.8°F) throughout September.

Heat index

Throughout September, the heat index is computed to be 29°C (84.2°F). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.

Humidity

In September, the average relative humidity in Annaba is 68%.

Rainfall

In September, the rain falls for 9 days. Throughout September, 21mm (0.83") of precipitation is accumulated. Throughout the year, in Annaba, there are 135.7 rainfall days, and 464mm (18.27") of precipitation is accumulated.

Sea temperature

In Annaba, in September, the average water temperature is 25°C (77°F).
Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

In Annaba, the average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 06:00 and sunset at 18:57. On the last day of the month, sunrise is at 06:23 and sunset at 18:13 CET.

Sunshine

The average sunshine in September is 9.5h.

UV index

In Annaba, Algeria, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Stay aware! UV radiation is magnified when reflecting off sand and water.