August weather forecast
Vila Viçosa, Portugal

The last month of the summer, August, is another tropical month in Vila Viçosa, Portugal, with temperature in the range of an average high of 33.7°C (92.7°F) and an average low of 16.9°C (62.4°F).

Temperature

August, with its high-temperature average of 33.7°C (92.7°F) and a low-temperature average of 16.9°C (62.4°F), is the warmest month.

Heat index

In August, the average heat index is appraised at a torrid 37°C (98.6°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

August is the least humid month in Vila Viçosa, with an average relative humidity of 49%.

Rainfall

In Vila Viçosa, in August, during 2 rainfall days, 3mm (0.12") of precipitation is typically accumulated. In Vila Viçosa, during the entire year, the rain falls for 95.6 days and collects up to 308mm (12.13") of precipitation.

Daylight

In Vila Viçosa, the average length of the day in August is 13h and 38min.
On the first day of the month, sunrise is at 06:31 and sunset at 20:40. On the last day of August, sunrise is at 06:58 and sunset at 20:01 WEST.

Sunshine

July and August, with an average of 11.4h of sunshine, are months with the most sunshine.

UV index

August is the month with the highest UV index in Vila Viçosa, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 7 during August, leads to the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.