August weather forecast
Santarem, Portugal

August continues the trend of high temperatures in Santarem, exceeding July's average maximum slightly to peak at 31°C (87.8°F). In alignment with the rest of summer, minimal rainfall is noted. The extended daylight hours, paired with high temperatures, add to the city's summer charm. Despite a decrease in humidity and scarce rainfall, August is endowed with plenty of sunshine, offering bright and sun-filled days. In essence, Santarem's August maintains summer's quintessential features: high temperatures, blazing sun, and barely any rainfall.

Temperature

With average temperatures fluctuating between a high of 31°C (87.8°F) and a low of 15.6°C (60.1°F), August stands out as the warmest month.

Heat index

The heat index value for August is computed to be a torrid 35°C (95°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

With an average relative humidity of 62%, August is the least humid month.

Rainfall

July and August are months with the least rain in Santarem when the rain falls for 2.4 days and typically aggregates up to 3mm (0.12") of rain.

Daylight

In Santarem, the average length of the day in August is 13h and 40min.
On the first day of the month, sunrise is at 06:35 and sunset at 20:46. On the last day of August, sunrise is at 07:02 and sunset at 20:06 WEST.

Sunshine

The average sunshine in August is 11h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in August transforms into the following instructions:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.