September weather forecast
Chio, Angola

September, the first month of the spring in Chio, is still a tropical month, with an average temperature fluctuating between 31.4°C (88.5°F) and 19.5°C (67.1°F).

Temperature

September welcomes an average high-temperature of a still tropical 31.4°C (88.5°F), not much different from the preceding month. In Chio, the average low-temperature during the month of September is a refreshing 19.5°C (67.1°F).

Heat index

In September, the heat index is evaluated at a very hot 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in September in Chio is 64%.

Rainfall

In September, in Chio, the rain falls for 11.3 days. Throughout September, 16mm (0.63") of precipitation is accumulated. Throughout the year, there are 208.7 rainfall days, and 1182mm (46.54") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 3min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:01. On the last day of September, in Chio, Angola, sunrise is at 05:48 and sunset at 17:59 WAT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

The months with the highest UV index in Chio are January through December, with an average maximum UV index of 6. The months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 6 during September translates into the following guidance:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.