September weather forecast
Pirada, Guinea-Bissau

As Pirada transitions to autumn, September witnesses a decrease in rainfall to 142mm (5.59"). The tropical climate still holds its grip on the city, with heat indices remaining one of the season's highest. Cloud cover recedes gradually, allowing increased sunlight, leading to a marginal rise in the UV index. The hitherto steady wind speeds take a hit, marking a downturn. Nevertheless, temperatures continue a cooling trend, with a lower limit of 23.2°C (73.8°F).

Temperature

The arrival of September in Pirada coincides with an average high-temperature of a still hot 32.1°C (89.8°F), indicating a minimal shift from August's 31.6°C (88.9°F). An average low-temperature of 23.2°C (73.8°F) is common during the nights of September.

Heat index

For September, the heat index is evaluated at a life-threatening hot 47°C (116.6°F). Stay watchful: Heat exhaustion along with heat cramps are likely. Ongoing effort may cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

August and September, with an average relative humidity of 84%, are the most humid months in Pirada.

Rainfall

In Pirada, in September, during 23.3 rainfall days, 142mm (5.59") of precipitation is typically accumulated. In Pirada, during the entire year, the rain falls for 107.8 days and collects up to 540mm (21.26") of precipitation.

Daylight

In Pirada, the average length of the day in September is 12h and 12min.
On the first day of September in Pirada, sunrise is at 06:45 and sunset at 19:07. On the last day of the month, sunrise is at 06:45 and sunset at 18:47 GMT.

Sunshine

The average sunshine in September in Pirada is 7.6h.

UV index

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.