July weather forecast
Viana do Alentejo, Portugal

July in Viana do Alentejo, Portugal, is a hot summer month, with temperature in the range of an average high of 33.1°C (91.6°F) and an average low of 16.7°C (62.1°F).

Temperature

With the onset of July, Viana do Alentejo's average high-temperature experiences a slight rise, moving from June's warm 29.3°C (84.7°F) to a hot 33.1°C (91.6°F). Viana do Alentejo observes a distinct decrease from peak daytime temperatures, with an average low-temperature of 16.7°C (62.1°F) throughout the month of July.

Heat index

The heat index in July is estimated at a very hot 37°C (98.6°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

In Viana do Alentejo, the average relative humidity in July is 51%.

Rainfall

July is the month with the least rainfall in Viana do Alentejo. Rain falls for 2.3 days and accumulates 2mm (0.08") of precipitation.

Daylight

The average length of the day in July is 14h and 32min.
On the first day of the month, sunrise is at 06:12 and sunset at 20:59. On the last day of July, sunrise is at 06:33 and sunset at 20:42 WEST.

Sunshine

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

UV index

In Viana do Alentejo, the average daily maximum UV index in July is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 6 in July translates into this advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.