September weather forecast
São Lucas, Angola

September, the first month of the spring in São Lucas, is still a tropical month, with an average temperature fluctuating between 31.5°C (88.7°F) and 16.2°C (61.2°F).

Temperature

São Lucas's temperatures tend to reach their peak averages in September, with a high of 31.5°C (88.7°F) and a low of 16.2°C (61.2°F).

Heat index

Throughout September, the heat index is computed to be a fiery hot 35°C (95°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Observations indicate that the heat index values are for shady locations with light wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In São Lucas, the average relative humidity in September is 57%.

Rainfall

In São Lucas, in September, during 9.3 rainfall days, 25mm (0.98") of precipitation is typically accumulated. In São Lucas, during the entire year, the rain falls for 198 days and collects up to 1143mm (45") of precipitation.

Daylight

In September, the average length of the day is 12h and 3min.
On the first day of September in São Lucas, Angola, sunrise is at 05:58 and sunset at 17:52. On the last day of the month, sunrise is at 05:39 and sunset at 17:51 WAT.

Sunshine

September has the most sunshine of the year, with an average of 9.4h of sunshine.

UV index

The months with the highest UV index are May, July through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 6 during September leads to these instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. 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. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.