September weather forecast
Jumbembem, Guinea-Bissau

September, the first month of the autumn in Jumbembem, is still a hot month, with temperature in the range of an average high of 31.7°C (89.1°F) and an average low of 23°C (73.4°F).

Temperature

September's arrival brings an average high-temperature of a still hot 31.7°C (89.1°F), slightly deviating from August's 31°C (87.8°F). Jumbembem usually reports an average low-temperature of 23°C (73.4°F) during the month of September.

Heat index

Throughout September, the heat index is computed to be a blazing hot 45°C (113°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In September, the average relative humidity is 85%.

Rainfall

In Jumbembem, in September, during 23.9 rainfall days, 145mm (5.71") of precipitation is typically accumulated. Throughout the year, there are 107.6 rainfall days, and 593mm (23.35") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of the month, sunrise is at 06:49 and sunset at 19:10. On the last day of September, sunrise is at 06:49 and sunset at 18:50 GMT.

Sunshine

In September, the average sunshine is 7.2h.

UV index

The average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. 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. Stay sun-safe with clothing that is both closely woven and worn loosely.