October weather forecast
Santarém, Brazil

October, the same as September, in Santarém, Brazil, is another hot spring month, with an average temperature ranging between min 25.8°C (78.4°F) and max 34.5°C (94.1°F).

Temperature

Temperature readings reach their annual highs in October, averaging 34.5°C (94.1°F) and a minimum average of 25.8°C (78.4°F).

Heat index

October's average heat index is evaluated at a life-threatening hot 45°C (113°F). Take heed: Heat exhaustion and heat cramps are anticipated. Heatstroke is a potential outcome of continuous activity.
Understanding the heat index involves considering values for shaded locales with light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The average relative humidity in October in Santarém is 64%.

Rainfall

In Santarém, in October, it is raining for 15.3 days, with typically 60mm (2.36") of accumulated precipitation. Throughout the year, there are 259.2 rainfall days, and 2234mm (87.95") of precipitation is accumulated.

Daylight

In Santarém, the average length of the day in October is 12h and 10min.
On the first day of October in Santarém, sunrise is at 06:24 and sunset at 18:32. On the last day of the month, sunrise is at 06:16 and sunset at 18:28 -03.

Sunshine

In October, the average sunshine in Santarém, Brazil, is 9.5h.

UV index

The months with the highest UV index are January, April through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: An average UV index of 7 in October transforms into this advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.