September weather forecast
Libari, Guinea-Bissau

September, the first month of the autumn in Libari, is still a tropical month, with an average temperature fluctuating between 31.4°C (88.5°F) and 23.6°C (74.5°F).

Temperature

As Libari steps into September, the average high-temperature is measured at a still tropical 31.4°C (88.5°F), displaying minor differences from August's 30.5°C (86.9°F). In the month of September, the average temperature in Libari, Guinea-Bissau, dips to a moderately hot 23.6°C (74.5°F) during the night.

Heat index

The heat index value for September is appraised at an extremely hot 44°C (111.2°F). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

The months with the highest humidity in Libari are August and September, with an average relative humidity of 84%.

Rainfall

In Libari, during September, the rain falls for 24.5 days and regularly aggregates up to 153mm (6.02") of precipitation. In Libari, during the entire year, the rain falls for 111.2 days and collects up to 710mm (27.95") of precipitation.

Daylight

In Libari, the average length of the day in September is 12h and 11min.
On the first day of September, sunrise is at 06:51 and sunset at 19:12. On the last day of the month, sunrise is at 06:51 and sunset at 18:52 GMT.

Sunshine

In Libari, the average sunshine in September is 7.2h.

UV index

The average daily maximum UV index in September in Libari is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.