September weather forecast
Boe, Guinea-Bissau

The arrival of September signals a noticeable decline in rainfall, reducing to 168mm (6.61"), signifying the gradual retreat of the wet season. Despite the reduced rainfall, high humidity levels persist at 85%. Temperature readings exhibit mild fluctuations, with the maximum temperature rising to 30.9°C (87.6°F) while the minimum temperature subtly decreases to 23.6°C (74.5°F). Consequently, the city sees a slight increase in sunshine hours, yet it remains far from matching the averages viewed at the start of the year.

Temperature

Boe's average high-temperature in September sits at a hot 30.9°C (87.6°F), showing little difference from the previous month. Boe in September experiences a low-temperature average of 23.6°C (74.5°F).

Heat index

September's heat index is estimated at a blisteringly hot 42°C (107.6°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

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

Rainfall

In Boe, in September, it is raining for 22.2 days, with typically 168mm (6.61") of accumulated precipitation. Throughout the year, in Boe, there are 109.7 rainfall days, and 868mm (34.17") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 11min.
On the first day of the month, sunrise is at 06:46 and sunset at 19:06. On the last day of September, sunrise is at 06:45 and sunset at 18:47 GMT.

Sunshine

The average sunshine in September is 6.4h.

UV index

The months with the highest UV index are January through July, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.