September weather forecast
Terreiro, Angola

September, the first month of the spring in Terreiro, is still a tropical month, with an average temperature ranging between max 30.2°C (86.4°F) and min 18°C (64.4°F).

Temperature

The onset of September brings an average high-temperature of a still tropical 30.2°C (86.4°F), nearly matching the August temperature. Contrary to the day's heat, an average low-temperature of 18°C (64.4°F) is recorded during the nights in September in Terreiro, Angola.

Heat index

During September, the heat index is estimated at a torrid 36°C (96.8°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

The average relative humidity in September is 70%.

Rainfall

In Terreiro, during September, the rain falls for 24.6 days and regularly aggregates up to 82mm (3.23") of precipitation. In Terreiro, during the entire year, the rain falls for 261.7 days and collects up to 1536mm (60.47") of precipitation.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of the month, sunrise is at 06:00 and sunset at 17:58. On the last day of September, in Terreiro, sunrise is at 05:44 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

April through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 6 translates into these guidelines:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.