October weather forecast
Porto Velho, Brazil

October, like September, is another tropical spring month in Porto Velho, Brazil, with an average temperature varying between 23.5°C (74.3°F) and 34.9°C (94.8°F).

Temperature

October begins with an average high-temperature of a hot 34.9°C (94.8°F), reflecting close similarity to the preceding month. Porto Velho's October nights cool down to an average low-temperature of 23.5°C (74.3°F).

Heat index

The heat index in October is estimated at a life-threatening hot 51°C (123.8°F). Be prepared: Heat cramps and heat exhaustion are probable. Continued activity may lead to heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In October, the average relative humidity in Porto Velho, Brazil, is 71%.

Rainfall

In Porto Velho, during October, the rain falls for 20.9 days and regularly aggregates up to 86mm (3.39") of precipitation. Throughout the year, in Porto Velho, Brazil, there are 251.1 rainfall days, and 1471mm (57.91") of precipitation is accumulated.

Daylight

In October, the average length of the day is 12h and 18min.
On the first day of October in Porto Velho, sunrise is at 05:59 and sunset at 18:10. On the last day of the month, sunrise is at 05:46 and sunset at 18:11 -04.

Sunshine

October has the most sunshine of the year in Porto Velho, with an average of 10.3h of sunshine.

UV index

The months with the highest UV index are May through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 7 during October, leads to the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.