September weather forecast
Velingara, Guinea-Bissau

The first month of the autumn, September, is also a hot month in Velingara, Guinea-Bissau, with an average temperature fluctuating between 23.2°C (73.8°F) and 32.1°C (89.8°F).

Temperature

September brings an average high-temperature of a still hot 32.1°C (89.8°F), showing a slight difference from August's 31.6°C (88.9°F). September nights observe an average temperature dip to a warm 23.2°C (73.8°F).

Heat index

The heat index in September is computed to be a burning hot 47°C (116.6°F). Be careful: Heat exhaustion and heat cramps are probable. Heatstroke may result from extended activity.
The heat index's values are generally associated with conditions in shade and light breezes. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

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

Rainfall

In Velingara, Guinea-Bissau, during September, the rain falls for 23.3 days and regularly aggregates up to 142mm (5.59") of precipitation. Throughout the year, there are 107.8 rainfall days, and 540mm (21.26") of precipitation is accumulated.

Daylight

The average length of the day in September in Velingara is 12h and 11min.
On the first day of September in Velingara, sunrise is at 06:45 and sunset at 19:06. On the last day of the month, sunrise is at 06:44 and sunset at 18:46 GMT.

Sunshine

In Velingara, the average sunshine in September is 7.6h.

UV index

The average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.