September weather forecast
Algiers, Algeria

As Algiers moves into September, the intense summer heat gradually declines, leading to a more comfortable climate. Still, the city experiences less rainfall with an average of just 28mm (1.1"). September marks a good time to visit, with pleasant weather that is perfect for strolling across the city's fascinating sites. Enjoy the transition from summer into fall as Algiers showcases its remarkable beauty.

Temperature

September in Algiers observes an average high-temperature of a warm 29.7°C (85.5°F), marking an insignificant difference from August's 32.3°C (90.1°F). Throughout the nights in September, Algiers experiences an average low-temperature of 17.8°C (64°F).

Heat index

During September, the heat index is calculated to be a sweltering 35°C (95°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Consider that heat index readings are for situations in the shade and light wind. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Algiers, in September, during 5 rainfall days, 28mm (1.1") of precipitation is typically accumulated. Throughout the year, in Algiers, there are 90 rainfall days, and 518mm (20.39") of precipitation is accumulated.

Sea temperature

In Algiers, the average seawater temperature in September is 24.5°C (76.1°F).
Note: If cold is not your friend, swimming at 24.5°C (76.1°F) might be daunting. But the right mix of sunshine, wind, and external temperature can make a difference. Although wetsuits are not essential, they can enhance the swimming experience.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of the month, sunrise is at 06:19 and sunset at 19:15. On the last day of September, in Algiers, sunrise is at 06:42 and sunset at 18:32 CET.

Sunshine

In Algiers, the average sunshine in September is 7.9h.

UV index

The average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.