September weather forecastBolongongo, Angola

Weather in September

September, the first month of the spring in Bolongongo, is still a tropical month, with temperature in the range of an average high of 30.2°C (86.4°F) and an average low of 18°C (64.4°F).

Temperature

The advent of September sees the average high-temperature at a still tropical 30.2°C (86.4°F), subtly shifted from August's 31.3°C (88.3°F). Bolongongo undergoes a major shift from daytime highs, averaging a comfortable 18°C (64.4°F) during the night in September.

Heat index

Throughout September, the heat index is estimated at a fiery hot 36°C (96.8°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

The average relative humidity in September is 70%.

Rainfall

In Bolongongo, during September, the rain falls for 24.6 days and regularly aggregates up to 82mm (3.23") of precipitation. Throughout the year, there are 261.7 rainfall days, and 1536mm (60.47") of precipitation is accumulated.

Daylight

In Bolongongo, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 06:00 and sunset at 17:57. On the last day of September, sunrise is at 05:43 and sunset at 17:54 WAT.

Sunshine

September has the most sunshine of the year, with an average of 8.6h 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 estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.