September weather forecast
Pechilal, Guinea-Bissau

September, the first month of the autumn in Pechilal, is a tropical month, with an average temperature fluctuating between 30.9°C (87.6°F) and 24.7°C (76.5°F).

Temperature

The average high-temperature is a tropical 30.9°C (87.6°F) in September, hardly different from the 29.8°C (85.6°F) recorded in August. In Pechilal, the average temperature during the nights of September drops to a moderately hot 24.7°C (76.5°F).

Heat index

For most parts of September, the heat index is computed to be a blisteringly hot 41°C (105.8°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. 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 are extremely significant for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. 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 absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The average relative humidity in September in Pechilal, Guinea-Bissau, is 80%.

Rainfall

In September, the rain falls for 20.5 days. Throughout September, 133mm (5.24") of precipitation is accumulated. In Pechilal, during the entire year, the rain falls for 103.1 days and collects up to 677mm (26.65") of precipitation.

Daylight

In September, the average length of the day in Pechilal is 12h and 11min.
On the first day of the month, sunrise is at 06:53 and sunset at 19:14. On the last day of September, in Pechilal, Guinea-Bissau, sunrise is at 06:53 and sunset at 18:54 GMT.

Sunshine

In Pechilal, the average sunshine in September is 7.3h.

UV index

The months with the highest UV index in Pechilal are January through June, September through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.