Freetown
Sierra Leone
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Freetown, Sierra Leone

The hilly seaside city of Freetown in Sierra Leone, with calm waters on sunny dusk
The hilly seaside city of Freetown in Sierra Leone, with calm waters on sunny dusk
The first month of the autumn, September, is still a warm month in Freetown, Sierra Leone, with average temperature fluctuating between 29°C (84.2°F) and 23.1°C (73.6°F).

Temperature

In Freetown, Sierra Leone, the average high-temperature is almost the same as in August - a still moderately hot 29°C (84.2°F). The average low-temperature, in Freetown, is 23.1°C (73.6°F).

Humidity

The average relative humidity in Freetown is 80%.

Rainfall

In Freetown, it is raining for 24 days, with typically 484.1mm (19.1") of accumulated precipitation. In Freetown, during the entire year, the rain falls for 152 days and collects up to 2945.3mm (116") of precipitation.

Sea temperature

In Freetown, the average seawater temperature is 27.6°C (81.7°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in Freetown is 12.2h.

Sunshine

The average sunshine in Freetown is 4.2h.

UV index

February through May, August through October, with an average maximum UV index of 12, are months with the highest UV index in Freetown. A UV Index value of 11, and more, symbolizes an extreme threat to health from the exposure to the Sun's UV rays for the average person.
In September, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in September in Freetown?

In Freetown, in September, the average high-temperature is 29°C (84.2°F), and the average low-temperature is 23.1°C (73.6°F).

What is the average humidity in September in Freetown?

The average relative humidity in September in Freetown is 80%.

How many days does it rain in September in Freetown?

In September, the rain falls for 24 days. Throughout September, 484.1mm (19.1") of precipitation is accumulated.

What is the water temperature in September in Freetown?

In Freetown, in September, the average water temperature is 27.6°C (81.7°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Freetown?

The average length of the day in September in Freetown is 12.2h.

How many hours of sunshine does Freetown have in September?

The average sunshine in September in Freetown, Sierra Leone, is 4.2h.

What is the month with the highest UV index in Freetown?

February through May, August through October, with an average maximum UV index of 12, are months with the highest UV index in Freetown, Sierra Leone.

How high is the UV index in September in Freetown?

The average daily maximum UV index in September in Freetown, Sierra Leone, is 12. A UV Index of 11, and more, symbolizes an excessive health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Freetown, Sierra Leone
  • Average high temperature in September: 29°C

The warmest month (with the highest average high temperature) is April (31.2°C).
The month with the lowest average high temperature is August (28.4°C).

  • Average low temperature in September: 23.1°C

The month with the highest average low temperature is April (24.8°C).
The coldest month (with the lowest average low temperature) is August (23°C).

Average humidity in September - Freetown, Sierra Leone
  • Average humidity in September: 80%

The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (66%).

Average rainfall in September - Freetown, Sierra Leone
  • Average rainfall in September: 484.1mm

The wettest month (with the highest rainfall) is August (791.1mm).
The driest month (with the lowest rainfall) is January (3.4mm).

Average rainfall days in September - Freetown, Sierra Leone
  • Average rainfall days in September: 24 days

Months with the highest number of rainy days are July and August (27 days).
Months with the lowest number of rainy days are January and February (0 days).

Average sea temperature in September - Freetown, Sierra Leone
  • Average sea temperature in September: 27.6°C

Best months for swimming (with the highest average sea temperature) are November and December (28.8°C).
The coldest month (with the lowest average sea temperature) is August (27.3°C).

Average daylight in September / Average sunshine in September - Freetown, Sierra Leone
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.6h).
The month with shortest days is December (Average daylight: 11.6h).

  • Average sunshine in September: 4.2h

The month with most sunshine is February (Average sunshine: 7.7h).
The month with least sunshine is August (Average sunshine: 2.8h).

Average UV index in September - Freetown, Sierra Leone
  • Average UV index in September: 12

Months with the highest UV index are February, March, April, May, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).