September weather forecast
Xiamen, China

Come September, Xiamen begins to witness a shift in weather, with indications of the forthcoming autumn. Despite the slight retreat in temperature, it remains largely warm. However, rainfall descends to 141mm (5.55"), a noticeable decrease from the August deluge, indicating a decline in the monsoon. Humidity starts tapering off with a mellow retreat, offering a more comfortable environment. September unveils the perfect blend of a warm atmosphere and diminishing rainfall, offering an ideal time for exploring the outdoor beauty of Xiamen.

Temperature

During September, Xiamen records an average high-temperature of a still tropical 30°C (86°F), marking a slight divergence from August's 31.8°C (89.2°F). Xiamen records an average temperature drop to a warm 23.3°C (73.9°F) in September.

Heat index

September's average heat index is evaluated at a very hot 37°C (98.6°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are essentially critical for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in September is 78%.

Rainfall

In Xiamen, during September, the rain falls for 9 days and regularly aggregates up to 141mm (5.55") of precipitation. In Xiamen, during the entire year, the rain falls for 121 days and collects up to 1349mm (53.11") of precipitation.

Sea temperature

In September, the average sea temperature in Xiamen is 26.9°C (80.4°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in September in Xiamen, China, is 12h and 18min.
On the first day of the month, sunrise is at 05:48 and sunset at 18:26. On the last day of September, in Xiamen, China, sunrise is at 05:59 and sunset at 17:55 CST.

Sunshine

The average sunshine in September is 6h.

UV index

The average daily maximum UV index in September is 11. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A daily maximum UV index of 11 in September translates into the following instructions:
Adopt every precaution of necessity, unprotected skin and eyes may suffer burns instantly. 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. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Directly after swimming or an outdoor workout, generously apply and reapply a broad-spectrum SPF 30+ sunscreen. Attention! The reflection of both water and sand can increase the intensity of UV rays.