September weather forecast
Neves, São Tomé and Príncipe

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Weather in September

September in Neves, São Tomé and Príncipe witnesses a mild increase in rainfall, indicating a shift towards the wetter season. With rain levels reaching 35mm (1.38"), the city begins to prepare for the incoming rainy season. Contradictorily, the cloud cover reduces slightly, creating an intriguing climatic scenario. Such variations in the weather enrich the natural landscape, enhancing the city’s beauty. The disparity in weather conditions creates a captivating view of the city with clear skies and occasional rain showers.

Temperature

As Neves transitions into September, the average high-temperature stands at a still moderately hot 25.5°C (77.9°F), offering little variation from the preceding month. Neves's September nights witness minimal differential from the daytime temperatures, with averages of 24.6°C (76.3°F).

Humidity

August through October, with an average relative humidity of 83%, are the most humid months.

Rainfall

In Neves, during September, the rain falls for 15.8 days and regularly aggregates up to 35mm (1.38") of precipitation. In Neves, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.

Daylight

In September, the average length of the day is 12h and 7min.
On the first day of September, sunrise is at 05:30 and sunset at 17:37. On the last day of the month, sunrise is at 05:20 and sunset at 17:26 GMT.

Sunshine

The average sunshine in September is 5.4h.

UV index

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, an average UV index of 6 transforms into the following instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.

Frequently asked questions

What are September temperatures?

During September, Neves experiences an average high-temperature of 25.5°C (77.9°F) and a low-temperature of 24.6°C (76.3°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in May is appraised at 31°C (87.8°F).

What is the most humid month?

August through October, with an average relative humidity of 83%, are most humid months.

What is the average humidity in September?

In September, the average relative humidity is 83%.

How much does it rain in September?

In Neves, 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?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 05:30 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 Neves have in September?

In Neves, the average sunshine duration in September is 5.4h.

What is the UV index reading in September?

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Neves, São Tomé and Príncipe

Average temperature in September - Neves, 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
Neves, São Tomé and Príncipe

Average pressure in September - Neves, 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
Neves, São Tomé and Príncipe

Average wind speed in September - Neves, 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
Neves, São Tomé and Príncipe

Average humidity in September - Neves, 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
Neves, São Tomé and Príncipe

Average rainfall in September - Neves, 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
Neves, São Tomé and Príncipe

Average rainfall days in September - Neves, 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
Neves, São Tomé and Príncipe

Average daylight in September / Average sunshine in September - Neves, 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
Neves, São Tomé and Príncipe

Average sunshine days in September - Neves, 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
Neves, São Tomé and Príncipe

Average UV index in September - Neves, 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
Neves, São Tomé and Príncipe

Average cloud cover in September - Neves, 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
Neves, São Tomé and Príncipe

Average visibility in September - Neves, 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).

Neves, São Tomé and Príncipe

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