July weather forecast
Santarem, Portugal

The zenith of summer in Santarem arrives with July. The extraordinary influence of high temperatures, reaching up to 29.8°C (85.6°F), attests to the strength of summer. A striking feature is the scanty rainfall registered this month, making it one of the driest months of the year. The reduced humidity, complemented by extended sunshine and daylight hours, heightens the dry and hot conditions. All these factors contribute to a weather scenario dominated by glaring sun, high temperatures, and minimalistic rainfall.

Temperature

As July arrives in Santarem, a slight rise in the average high-temperature is observed, moving from 26.8°C (80.2°F) in June to a still moderately hot 29.8°C (85.6°F). Compared to daytime temperatures, Santarem's temperature drops significantly, averaging a moderate 15.8°C (60.4°F) during the nights of July.

Heat index

The heat index value during July is computed to be a hot 33°C (91.4°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to 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.

Humidity

In July, the average relative humidity is 65%.

Rainfall

July and August are months with the least rain when the rain falls for 2.9 days and typically aggregates up to 3mm (0.12") of rain.

Daylight

In Santarem, the average length of the day in July is 14h and 37min.
On the first day of the month, sunrise is at 06:12 and sunset at 21:05. On the last day of July, in Santarem, sunrise is at 06:34 and sunset at 20:47 WEST.

Sunshine

July has the most sunshine of the year, with an average of 11.2h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 6 during July translates into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.