September weather forecast
Jopá, Guinea-Bissau

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

Temperature

As Jopá welcomes September, the average high-temperature stabilizes at a tropical 30.9°C (87.6°F), showing little deviation from August's 29.8°C (85.6°F). Jopá experiences an average temperature drop to a warm 24.7°C (76.5°F) during September nights.

Heat index

For September, the heat index is estimated at an extremely hot 41°C (105.8°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. 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 hold particular significance for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in September is 80%.

Rainfall

In September, in Jopá, Guinea-Bissau, the rain falls for 20.5 days. Throughout September, 133mm (5.24") of precipitation is accumulated. Throughout the year, in Jopá, Guinea-Bissau, there are 103.1 rainfall days, and 677mm (26.65") 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 06:53 and sunset at 19:14. On the last day of September, in Jopá, sunrise is at 06:52 and sunset at 18:54 GMT.

Sunshine

In Jopá, 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 value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.