September weather forecast
Antotinha, Guinea-Bissau

September marks a significant change in Antotinha's weather, being the transition point from the wet to the dry season. The city perceives a reduction in the amount of rainfall to 49mm (1.93"), a clear departure from the heavy rains of prior months. Temperatures rebound noticeably, with the peak returning to a comfortable 31.6°C (88.9°F). Despite the persistent cloud cover, the sun begins to assert its presence with longer sunshine hours compared to previous months. As rainfall recedes, the city gradually shifts towards a drier climate, preparing for the onset of the hot season.

Temperature

As Antotinha steps into September, the average high-temperature holds at a still hot 31.6°C (88.9°F), hinting at a minor fluctuation from the prior month. September nights in Antotinha cool down to an average low-temperature of 23.2°C (73.8°F).

Heat index

Throughout September, the heat index is estimated at a burning hot 45°C (113°F). Keep wary: Heat cramps along with heat exhaustion are expected. Heatstroke is a possible outcome of ongoing activity.
The heat index's values are generally associated with conditions in shade and light breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In September, the average relative humidity in Antotinha is 84%.

Rainfall

In Antotinha, in September, it is raining for 23.7 days, with typically 152mm (5.98") of accumulated precipitation. In Antotinha, Guinea-Bissau, during the entire year, the rain falls for 109.1 days and collects up to 654mm (25.75") of precipitation.

Daylight

In Antotinha, the average length of the day in September is 12h and 11min.
On the first day of September, sunrise is at 06:52 and sunset at 19:13. On the last day of the month, sunrise is at 06:52 and sunset at 18:53 GMT.

Sunshine

In Antotinha, the average sunshine in September is 7h.

UV index

The average daily maximum UV index in September in Antotinha, Guinea-Bissau, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Experience reduced UV exposure by about half when donning a wide-brim hat.