September weather forecast
Ilha das Cobras, Guinea-Bissau

The first month of the autumn, September, is a tropical month in Ilha das Cobras, Guinea-Bissau, with an average temperature varying between 25°C (77°F) and 30.5°C (86.9°F).

Temperature

As Ilha das Cobras steps into September, the average high-temperature holds at a tropical 30.5°C (86.9°F), hinting at a minor fluctuation from the prior month. During September, Ilha das Cobras experiences an average low-temperature of 25°C (77°F) at night.

Heat index

The heat index for September is computed to be an extremely hot 40°C (104°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Ilha das Cobras, Guinea-Bissau, the average relative humidity in September is 81%.

Rainfall

In Ilha das Cobras, in September, during 20.7 rainfall days, 132mm (5.2") of precipitation is typically accumulated. In Ilha das Cobras, during the entire year, the rain falls for 107.5 days and collects up to 726mm (28.58") of precipitation.

Daylight

In Ilha das Cobras, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 06:51 and sunset at 19:11. On the last day of September, in Ilha das Cobras, sunrise is at 06:50 and sunset at 18:52 GMT.

Sunshine

In September, the average sunshine in Ilha das Cobras is 7.5h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.