September weather forecast
Praia das Conchas, São Tomé and Príncipe

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Weather in September

September is a significant month for the climate in Praia das Conchas, marking the beginning of an increase in rainfall and humidity levels. Wind conditions remain relatively stable and consistent, balancing the humid and wet weather conditions of the region. However, even with increased rainfall amounts at 35mm (1.38"), there is still ample sunshine throughout the day. Tourists pondering a visit during this period should anticipate variable weather but also enjoy ample opportunities for sunbathing and exploring the natural beauty of the island.

Temperature

Praia das Conchas notes an average high-temperature of a still moderately hot 25.5°C (77.9°F) in September, displaying minor variation from August. Praia das Conchas, during September nights, observes a steady temperature, averaging at a still warm 24.6°C (76.3°F).

Humidity

The months with the highest humidity in Praia das Conchas, São Tomé and Príncipe, are August through October, with an average relative humidity of 83%.

Rainfall

In Praia das Conchas, São Tomé and Príncipe, in September, it is raining for 15.8 days, with typically 35mm (1.38") of accumulated precipitation. Throughout the year, in Praia das Conchas, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.

Daylight

The average length of the day in September in Praia das Conchas, São Tomé and Príncipe, is 12h and 7min.
On the first day of the month, sunrise is at 05:29 and sunset at 17:37. On the last day of September, in Praia das Conchas, sunrise is at 05:20 and sunset at 17:26 GMT.

Sunshine

In September, the average sunshine is 5.4h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A typical high UV index of 6 in September suggests the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.

Frequently asked questions

What is the average September temperature in Praia das Conchas?

The average high-temperature and low-temperature in Praia das Conchas during September are 25.5°C (77.9°F) and 24.6°C (76.3°F) respectively. In May, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 31°C (87.8°F).

What are the most humid months in Praia das Conchas?

The months with the highest humidity in Praia das Conchas are August through October, with an average relative humidity of 83%.

What is the average humidity in September in Praia das Conchas?

The average relative humidity in September in Praia das Conchas, São Tomé and Príncipe, is 83%.

How much does it rain in Praia das Conchas in September?

In Praia das Conchas, during September, the rain falls for 15.8 days and regularly aggregates up to 35mm (1.38") of precipitation.

What is the average length of the day in September in Praia das Conchas?

The average day length in September is 12h and 7min.

When are sunrise and sunset in September in Praia das Conchas?

On the first day of September in Praia das Conchas, São Tomé and Príncipe, sunrise is at 05:29 and sunset at 17:37. On the last day of the month, sunrise is at 05:20 and sunset at 17:26 GMT.

How many hours of sunshine does Praia das Conchas have in September?

In September, the average sunshine duration in Praia das Conchas is 5.4h.

What is the UV index reading in September in Praia das Conchas?

In Praia das Conchas, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.

Average temperature in September
Praia das Conchas, São Tomé and Príncipe

Average temperature in September - Praia das Conchas, São Tomé and Príncipe
  • Average high temperature in September: 25.5°C

The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).

  • Average low temperature in September: 24.6°C

The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).

Average pressure in September
Praia das Conchas, São Tomé and Príncipe

Average pressure in September - Praia das Conchas, São Tomé and Príncipe
  • Average pressure in September: 1013.1mbar

The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).

Average wind speed in September
Praia das Conchas, São Tomé and Príncipe

Average wind speed in September - Praia das Conchas, São Tomé and Príncipe
  • Average wind speed in September: 16.8km/h

The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).

Average humidity in September
Praia das Conchas, São Tomé and Príncipe

Average humidity in September - Praia das Conchas, São Tomé and Príncipe
  • Average humidity in September: 83%

The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).

Average rainfall in September
Praia das Conchas, São Tomé and Príncipe

Average rainfall in September - Praia das Conchas, São Tomé and Príncipe
  • Average rainfall in September: 35mm

The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).

Average rainfall days in September
Praia das Conchas, São Tomé and Príncipe

Average rainfall days in September - Praia das Conchas, São Tomé and Príncipe
  • Average rainfall days in September: 15.8 days

The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).

Average daylight in September /
Average sunshine in September
Praia das Conchas, São Tomé and Príncipe

Average daylight in September / Average sunshine in September - Praia das Conchas, São Tomé and Príncipe
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is December (Average daylight: 12h and 6min).

  • Average sunshine in September: 5h and 2min

The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).

Average sunshine days in September
Praia das Conchas, São Tomé and Príncipe

Average sunshine days in September - Praia das Conchas, São Tomé and Príncipe
  • Average sunshine days in September: 5.3 days

The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).

Average UV index in September
Praia das Conchas, São Tomé and Príncipe

Average UV index in September - Praia das Conchas, São Tomé and Príncipe
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).

Average cloud cover in September
Praia das Conchas, São Tomé and Príncipe

Average cloud cover in September - Praia das Conchas, São Tomé and Príncipe
  • Average cloud cover in September: 62

The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).

Average visibility in September
Praia das Conchas, São Tomé and Príncipe

Average visibility in September - Praia das Conchas, São Tomé and Príncipe
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).

Praia das Conchas, São Tomé and Príncipe

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