September weather forecast
Co, Guinea-Bissau

The first month of the autumn, September, is a hot month in Co, Guinea-Bissau, with an average temperature fluctuating between 24.7°C (76.5°F) and 30.9°C (87.6°F).

Temperature

The onset of September manifests an average high-temperature of a tropical 30.9°C (87.6°F), demonstrating a minor variation from the preceding month. During September, Co sees a mean low-temperature of 24.7°C (76.5°F).

Heat index

The heat index in September is evaluated at a blistering 41°C (105.8°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In Co, the average relative humidity in September is 80%.

Rainfall

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

Daylight

The average length of the day in September in Co, Guinea-Bissau, is 12h and 11min.
On the first day of September in Co, 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 Co, the average sunshine in September is 7.3h.

UV index

The months with the highest UV index 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 risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.