August weather forecast
São Tomé, São Tomé and Príncipe

August, sails in like the breath of fresh air. Significant changes are marked with a rise in temperature from 20.5°C (68.9°F) to 27.7°C (81.9°F), and a minor escalation in rainfall. Comparatively, August lacks the clarity of the weather seen earlier in the year, indicating the upcoming shift in the seasonal cycle. It serves as a precursor to the remaining year, presenting myriad climatic elements in a balanced way.

Temperature

August registers an average high-temperature of a still warm 27.7°C (81.9°F), slightly varied from July's 27.3°C (81.1°F). São Tomé's temperature drops to an average low of 20.5°C (68.9°F) during the nights of August.

Heat index

August's mean heat index is calculated to be a tropical 31°C (87.8°F). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.
Understand that the heat index values take into account shaded locations and mild winds. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in August in São Tomé is 78%.

Rainfall

January through June, August through December are months with rainfall in São Tomé. August is the first month it rains. Throughout August, in the average 3 rainfall days, it receives 1mm (0.04") of precipitation. In São Tomé, during the entire year, the rain falls for 94 days and collects up to 885mm (34.84") of precipitation.

Sea temperature

In São Tomé, in August, the average water temperature is 26°C (78.8°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

The average length of the day in August in São Tomé is 12h and 8min.
On the first day of the month, sunrise is at 05:35 and sunset at 17:43. On the last day of August, sunrise is at 05:29 and sunset at 17:36 GMT.

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. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 12 during August translates into the following directions:
Put into action all crucial precautions. Defense against sun damage is a must. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity. Take heed! Reflections of sand and water make the Sun's UV rays stronger.