September weather forecast
Nambuangongo, Angola

September, the first month of the spring in Nambuangongo, is still a tropical month, with an average temperature ranging between max 31.1°C (88°F) and min 18.6°C (65.5°F).

Temperature

September brings a marginal elevation to a still tropical 31.1°C (88°F) from August's 32.5°C (90.5°F) in Nambuangongo's average high-temperatures. During September, Nambuangongo detects a significant contrast from its daytime temperatures, with nights averaging at a comfortable 18.6°C (65.5°F).

Heat index

The heat index value during September is estimated at a sweltering 38°C (100.4°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The average relative humidity in September is 69%.

Rainfall

In Nambuangongo, in September, during 18.8 rainfall days, 51mm (2.01") of precipitation is typically accumulated. Throughout the year, in Nambuangongo, there are 233.4 rainfall days, and 1395mm (54.92") of precipitation is accumulated.

Daylight

In Nambuangongo, Angola, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 06:04 and sunset at 18:02. On the last day of September, sunrise is at 05:47 and sunset at 17:58 WAT.

Sunshine

The month with the most sunshine is September, with an average of 7.9h of sunshine.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 6 during September translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.