October weather forecast
Porto Murtinho, Brazil

October, like September, is a hot spring month in Porto Murtinho, Brazil, with an average temperature varying between 34.5°C (94.1°F) and 22.5°C (72.5°F).

Temperature

October's arrival registers an average high-temperature of a still hot 34.5°C (94.1°F), closely aligning with the temperature of the previous month. In the month of October, Porto Murtinho witnesses a marked temperature drop at night, averaging a low of 22.5°C (72.5°F).

Heat index

The average heat index in October is appraised at a blisteringly hot 44°C (111.2°F). Be careful: Heat exhaustion and heat cramps are probable. Heatstroke may result from extended activity.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Porto Murtinho, the average relative humidity in October is 60%.

Rainfall

In Porto Murtinho, during October, the rain falls for 10.5 days and regularly aggregates up to 49mm (1.93") of precipitation. Throughout the year, there are 141.2 rainfall days, and 594mm (23.39") of precipitation is accumulated.

Daylight

In October, the average length of the day is 12h and 37min.
On the first day of the month, sunrise is at 05:31 and sunset at 17:50 -04. On the last day of October, sunrise is at 06:07 and sunset at 19:02 -03.
Note: On Sunday, 06. October 2024, at 00:00, Daylight Saving Time starts, and the time zone changes from -04 to -03. Daylight Saving Time lasts until Sunday, 23. March 2025, at 00:00; consequently, the time zone reverts from -03 to -04.

Sunshine

The average sunshine in October in Porto Murtinho is 8.7h.

UV index

The months with the highest UV index are January through March, August through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 7 in October translates into this advice:
Deter overexposure. Protecting against the sun's effects is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.