September weather forecast
Yaounde, Cameroon

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Yaounde city, Cameroon, with vast mountain ranges afar
Yaounde city, Cameroon, with vast mountain ranges afar

Weather in September

In September, Yaounde's weather achieves its second peak for the year in terms of rainfall, with an impressive 232mm (9.13") precipitation, almost twice the amount compared to August. This increase in rainfall, while substantial, is quite characteristic of Yaounde's equatorial climate. High temperature paired with high humidity continues to navigate the overall climate for the month. Despite the higher rainfall, the city ensures a predictable course of daylight hours for its inhabitants. The UV index stays steady at 12, signifying the persistent presence of harsh sun rays in the region.

Temperature

The initiation of September in Yaounde sees an average high-temperature of a still moderately hot 27.5°C (81.5°F), showing minor variations from the previous month. During the nights in September, Yaounde observes an average low-temperature of 19.3°C (66.7°F).

Heat index

During September, the heat index is estimated at a hot 32°C (89.6°F). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Given the heat index, its values are aligned with shaded sites and gentle winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.

Humidity

The average relative humidity in September in Yaounde is 85.5%.

Rainfall

In September, the rain falls for 20 days. Throughout September, 232mm (9.13") of precipitation is accumulated. In Yaounde, during the entire year, the rain falls for 144 days and collects up to 1541mm (60.67") of precipitation.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of September in Yaounde, sunrise is at 06:08 and sunset at 18:19. On the last day of the month, sunrise is at 06:01 and sunset at 18:06 WAT.

Sunshine

In Yaounde, the average sunshine in September is 3.4h.

UV index

The months with the highest UV index in Yaounde are January through May, August through November, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 12 in September translates into the following instructions:
Utilize all vital precautions. Guarding against sun harm is non-negotiable. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Being cautious under the Sun means limiting direct exposure, especially if you have a tendency to burn. And always wear sunscreen with 30 SPF or higher.

Frequently asked questions

What is the usual temperature for Yaounde in September?

An average high-temperature, in September, in Yaounde, is 27.5°C (81.5°F) and the average low-temperature is 19.3°C (66.7°F). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 32°C (89.6°F).

What is the average humidity in September in Yaounde?

In Yaounde, the average relative humidity in September is 85.5%.

How much does it rain in Yaounde in September?

In Yaounde, Cameroon, in September, it is raining for 20 days, with typically 232mm (9.13") of accumulated precipitation.

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

In September, the average day length in Yaounde is 12h and 8min.

When are sunrise and sunset in September in Yaounde?

In September, on the first day of the month, sunrise is at 06:08 and sunset at 18:19. On the last day of the month, in Yaounde, sunrise is at 06:01 and sunset at 18:06 WAT.

How many hours of sunshine does Yaounde have in September?

In Yaounde, the average sunshine duration in September is 3.4h.

When is the highest UV index in Yaounde?

The months with the highest UV index in Yaounde are January through May, August through November, with an average maximum UV index of 12.

What is the UV index reading in September in Yaounde?

In September, the average daily maximum UV index in Yaounde, Cameroon, is 12. A UV Index reading of 11, and higher, represents an extreme health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Yaounde, Cameroon

Average temperature in September - Yaounde, Cameroon
  • Average high temperature in September: 27.5°C

The warmest month (with the highest average high temperature) is February (31°C).
The months with the lowest average high temperature are July and August (26.5°C).

  • Average low temperature in September: 19.3°C

The months with the highest average low temperature are February, March and April (20.3°C).
The coldest month (with the lowest average low temperature) is October (19.2°C).

Average humidity in September
Yaounde, Cameroon

Average humidity in September - Yaounde, Cameroon
  • Average humidity in September: 85.5%

The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is December (79%).

Average rainfall in September
Yaounde, Cameroon

Average rainfall in September - Yaounde, Cameroon
  • Average rainfall in September: 232.3mm

The wettest month (with the highest rainfall) is October (293.6mm).
The driest month (with the least rainfall) is December (18.6mm).

Average rainfall days in September
Yaounde, Cameroon

Average rainfall days in September - Yaounde, Cameroon
  • Average rainfall days in September: 20 days

The month with the highest number of rainy days is October (23 days).
The months with the least rainy days are January and December (3 days).

Average daylight in September /
Average sunshine in September
Yaounde, Cameroon

Average daylight in September / Average sunshine in September - Yaounde, Cameroon
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).

  • Average sunshine in September: 3h and 2min

The month with the most sunshine is February (Average sunshine: 6h and 24min).
The month with the least sunshine is August (Average sunshine: 2h and 48min).

Average UV index in September
Yaounde, Cameroon

Average UV index in September - Yaounde, Cameroon
  • Average UV index in September: 12

The months with the highest UV index are January, February, March, April, May, August, September, October and November (UV index 12).
The months with the lowest UV index are June, July and December (UV index 11).

Yaounde, Cameroon

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