September weather forecast
Aberdeen, Sierra Leone

As September rolls in, Aberdeen, Sierra Leone begins to experience a slow retreat of the monsoon. The rainfall drastically reduces to 220mm (8.66"), marking the beginning of the end of the wet season. Even though the weather paves the way for a drier season, the saturation level in the air remains high. Although the city still sees frequent bouts of rain, the duration and intensity start dwindling. Meanwhile, the daylight hours start increasing, painting a brighter picture for the upcoming months.

Temperature

Aberdeen, Sierra Leone, registers an average high-temperature of a still moderately hot 28.1°C (82.6°F) at the commencement of September, closely related to the preceding month. Aberdeen observes a minimal variance in temperature, with a consistent average low of 24.4°C (75.9°F) during the nights of September.

Heat index

September's heat index is evaluated at a tropical 33°C (91.4°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

In Aberdeen, the average relative humidity in September is 85%.

Rainfall

In Aberdeen, in September, it is raining for 28.6 days, with typically 220mm (8.66") of accumulated precipitation. Throughout the year, in Aberdeen, there are 205.9 rainfall days, and 1507mm (59.33") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 06:44 and sunset at 19:01. On the last day of the month, sunrise is at 06:41 and sunset at 18:44 GMT.

Sunshine

The average sunshine in September is 6.7h.

UV index

January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index in Aberdeen. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.