São Tomé
São Tomé and Príncipe
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
São Tomé, São Tomé and Príncipe

Clear blue water crashing on the big shore rocks on the beach in São Tomé, São Tomé and Principe, with palm trees along the beautiful beach
Clear blue water crashing on the big shore rocks on the beach in São Tomé, São Tomé and Principe, with palm trees along the beautiful beach
The last month of the summer, August, is another warm month in São Tomé, São Tomé and Príncipe, with average temperature varying between 20.5°C (68.9°F) and 27.7°C (81.9°F).
The ideal sea water temperature of 26°C (78.8°F) and only 3 rainfall days, with 1mm (0") of accumulated rainfall, make August the best time for swimming and other water activities.

Temperature

In São Tomé, São Tomé and Príncipe, the average high-temperature is almost the same as in July - a still warm 27.7°C (81.9°F). In São Tomé, the average low-temperature is 20.5°C (68.9°F).

Heat index

In August, the average heat index is appraised at a tropical 31.1°C (88°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent.

Humidity

In August, the average relative humidity is 78%.

Rainfall

Months with rainfall in São Tomé are January through June, August through December.

Sea temperature

In São Tomé, the average seawater temperature is 26°C (78.8°F).
Note: 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

January through December, with an average of 12.1h of daylight, are months with the longest days in São Tomé, São Tomé and Príncipe. Months with the shortest days are January through December, with an average of 12.1h of daylight.

Sunshine

The average sunshine in August is 4.8h.

UV index

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index in São Tomé. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 12 interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 August in São Tomé?

The average high-temperature, in August, is 27.7°C (81.9°F), while the average low-temperature is 20.5°C (68.9°F).

What is the average humidity in August in São Tomé?

In August, the average relative humidity is 78%.

When does it start raining in São Tomé?

August is the first month it rains. Throughout August, in the average 3 rainfall days, it receives 1mm (0") of precipitation.

What is the sea water temperature in August in São Tomé?

In São Tomé, the average seawater temperature in August is 26°C (78.8°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

When are the longest days in São Tomé?

January through December, with an average of 12.1h of daylight, are months with the longest days in São Tomé.

What is the month with the shortest days in São Tomé?

Months with the shortest days in São Tomé are January through December, with an average of 12.1h of daylight.

What is the average length of the day in August in São Tomé?

In São Tomé, São Tomé and Príncipe, the average length of the day in August is 12.1h.

How many hours of sunshine does São Tomé have in August?

In August, the average sunshine in São Tomé is 4.8h.

When is the highest UV index in São Tomé?

Months with the highest UV index in São Tomé, São Tomé and Príncipe, are January through May, August through December, with an average maximum UV index of 12.

What is the UV index intensity in August in São Tomé?

In August, the average daily maximum UV index is 12. A UV Index of 11, and more, symbolizes an extreme health threat from the exposure to the Sun's UV rays.
Average temperature in August - São Tomé, São Tomé and Príncipe
  • Average high temperature in August: 27.7°C

The warmest month (with the highest average high temperature) is March (30.2°C).
The month with the lowest average high temperature is July (27.3°C).

  • Average low temperature in August: 20.5°C

Months with the highest average low temperature are March, April and May (22.6°C).
The coldest month (with the lowest average low temperature) is July (20.4°C).

Average humidity in August - São Tomé, São Tomé and Príncipe
  • Average humidity in August: 78%

Months with the highest relative humidity are January, November and December (85%).
The month with the lowest relative humidity is July (77%).

Average rainfall in August - São Tomé, São Tomé and Príncipe
  • Average rainfall in August: 1mm

The wettest month (with the highest rainfall) is March (131mm).
The driest month (with the lowest rainfall) is July (0mm).

Average rainfall days in August - São Tomé, São Tomé and Príncipe
  • Average rainfall days in August: 3 days

Months with the highest number of rainy days are March and October (12 days).
The month with the lowest number of rainy days is July (2 days).

Average sea temperature in August - São Tomé, São Tomé and Príncipe
  • Average sea temperature in August: 26°C

Best months for swimming (with the highest average sea temperature) are February, March and April (29°C).
The coldest month (with the lowest average sea temperature) is July (25°C).

Average daylight in August / Average sunshine in August - São Tomé, São Tomé and Príncipe
  • Average daylight in August: 12.1h

Months with the longest days are January, February, March, April, May, June, July, August, September, October, November and December (Average daylight: 12.1h).
Months with shortest days are January, February, March, April, May, June, July, August, September, October, November and December (Average daylight: 12.1h).

  • Average sunshine in August: 4.8h

The month with most sunshine is June (Average sunshine: 5.5h).
The month with least sunshine is October (Average sunshine: 3.7h).

Average UV index in August - São Tomé, São Tomé and Príncipe
  • Average UV index in August: 12

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