September weather forecast
Yao, Chad

September transitions from the rainy to the dry season in Yao, as the rainfall begins to decrease substantially to 36mm (1.42"), and temperatures start to rise once again. The relative humidity drops from August's 69% to a lesser 56% marking the shifting weather patterns. As the seasons transition, cloud dispersion increases, allowing for more daylight hours despite the lesser number of sunshine days. Wind speeds also witness a slight increase from August, contributing to the evaporation of water and drying out of the environment. September is also when the pressure begins its gradual climb back to its annual peak.

Temperature

The arrival of September coincides with an average high-temperature of a sweltering 35.5°C (95.9°F), indicating a minimal shift from August's 32.6°C (90.7°F). Yao records an average temperature drop to a moderately hot 26.1°C (79°F) in September.

Heat index

For September, the heat index is appraised at a blazing hot 45°C (113°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
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. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In September, the average relative humidity is 56%.

Rainfall

In September, in Yao, the rain falls for 12.9 days. Throughout September, 36mm (1.42") of precipitation is accumulated. In Yao, during the entire year, the rain falls for 76.3 days and collects up to 288mm (11.34") of precipitation.

Daylight

In Yao, the average length of the day in September is 12h and 12min.
On the first day of September in Yao, sunrise is at 05:38 and sunset at 18:00. On the last day of the month, sunrise is at 05:38 and sunset at 17:40 WAT.

Sunshine

In Yao, the average sunshine in September is 9.6h.

UV index

In Yao, the average daily maximum UV index in September is 8. A UV Index reading of 8 to 10 represents a very high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 8 in September transforms into this advice:
Swift harm can befall unprotected skin and eyes. Prioritize safety. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.