September weather forecast
Brandao, Guinea-Bissau

September, the first month of the autumn in Brandao, is a tropical month, with an average temperature ranging between max 30.9°C (87.6°F) and min 23.6°C (74.5°F).

Temperature

The arrival of September brings an average high-temperature of a hot 30.9°C (87.6°F), nearly identical to August's 29.9°C (85.8°F). Brandao temperatures generally rest at a low of 23.6°C (74.5°F) during the September nights.

Heat index

In September, the heat index is computed to be an extremely hot 42°C (107.6°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

August and September, with an average relative humidity of 85%, are the most humid months.

Rainfall

In September, the rain falls for 22.2 days. Throughout September, 168mm (6.61") of precipitation is accumulated. In Brandao, during the entire year, the rain falls for 109.7 days and collects up to 868mm (34.17") of precipitation.

Daylight

In September, the average length of the day is 12h and 11min.
On the first day of the month, sunrise is at 06:50 and sunset at 19:11. On the last day of September, in Brandao, sunrise is at 06:50 and sunset at 18:51 GMT.

Sunshine

In September, the average sunshine is 6.4h.

UV index

The months with the highest UV index in Brandao are January through July, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.