September weather forecast
Ouagadougou, Burkina Faso

Weather in September in Ouagadougou sees a significant decrease in rainfall to 139mm (5.47"), marking a shift towards the end of the rainy season. With this decline in rainfall, there's a consequent retreat in cloud cover, resulting in increased sunshine hours. Consistent with August, the temperatures stay relatively warm. A downward trend is observed in humidity, indicating a clear progression towards drier weather. The UV index remains considerably high, although somewhat less than the peak months.

Temperature

September is marked by an average high-temperature of a still tropical 32°C (89.6°F), almost identical to the preceding month. September witnesses an average nighttime temperature of 21.9°C (71.4°F).

Heat index

The heat index for September is calculated to be a scorching 40°C (104°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in September is 69.5%.

Rainfall

In Ouagadougou, in September, during 5.7 rainfall days, 139mm (5.47") of precipitation is typically accumulated. In Ouagadougou, Burkina Faso, during the entire year, the rain falls for 35.2 days and collects up to 788mm (31.02") of precipitation.

Daylight

In September, the average length of the day is 12h and 12min.
On the first day of September, sunrise is at 05:55 and sunset at 18:16. On the last day of the month, sunrise is at 05:55 and sunset at 17:56 GMT.

Sunshine

In Ouagadougou, the average sunshine in September is 7h.

UV index

The months with the highest UV index are February through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 12 transforms into these recommendations:
Employ every crucial safety step. Those with fair skin could experience burns in a matter of minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Regardless of the cloudiness of the day, a sunscreen with SPF 30 or more should be applied and reapplied generously, specifically after swimming or outdoor exercise.