September weather forecast
Mandiana, Guinea

With the arrival of September, rainfall in Mandiana starts to dwindle, dropping to 126mm (4.96"). However, temperatures begin to rise slightly, hitting highs of 29.3°C (84.7°F) during the day time. Winds remain light, averaging around 5.3km/h (3.3mph) during the month. Moreover, daylight hours begin to slight decrease, matching the gradual transition from the wet season. The weather becomes more balanced, setting in transition from the rainy period to the dry season.

Temperature

The start of September sees the average high-temperature at a still warm 29.3°C (84.7°F), showing little difference from August's 28.3°C (82.9°F). Throughout the month of September, the average temperature dips to a pleasant 20.8°C (69.4°F) at night.

Heat index

In September, the average heat index is estimated at a fiery hot 37°C (98.6°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In September, the average relative humidity in Mandiana is 87%.

Rainfall

In September, the rain falls for 25.8 days. Throughout September, 126mm (4.96") of precipitation is accumulated. In Mandiana, during the entire year, the rain falls for 154.5 days and collects up to 814mm (32.05") of precipitation.

Daylight

In Mandiana, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 06:25 and sunset at 18:44. On the last day of September, in Mandiana, Guinea, sunrise is at 06:23 and sunset at 18:25 GMT.

Sunshine

In September, the average sunshine is 7.8h.

UV index

The months with the lowest UV index are July through September and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In September, a daily UV index of 6 turns into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.