September weather forecast
Tumba Pequena, Angola

The first month of the spring, September, is still a tropical month in Tumba Pequena, Angola, with an average temperature ranging between max 31.4°C (88.5°F) and min 19.5°C (67.1°F).

Temperature

Tumba Pequena sees the arrival of September with an average high-temperature of a still hot 31.4°C (88.5°F), indicating a subtle variation from August. Nighttime temperatures hover around an average low of 19.5°C (67.1°F) in September.

Heat index

The heat index value during September is computed to be a fiery hot 37°C (98.6°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In September, the average relative humidity is 64%.

Rainfall

In September, the rain falls for 11.3 days. Throughout September, 16mm (0.63") of precipitation is accumulated. In Tumba Pequena, during the entire year, the rain falls for 208.7 days and collects up to 1182mm (46.54") of precipitation.

Daylight

In September, the average length of the day is 12h and 3min.
On the first day of the month, sunrise is at 06:03 and sunset at 17:59. On the last day of September, in Tumba Pequena, sunrise is at 05:45 and sunset at 17:56 WAT.

Sunshine

The average sunshine in September is 8.4h.

UV index

The months with the highest UV index 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 of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.