October weather forecast
Nantes, Brazil

October, like September, is a hot spring month in Nantes, Brazil, with an average temperature varying between 30.9°C (87.6°F) and 19.8°C (67.6°F).

Temperature

Temperature records mark October as the warmest month, with highs averaging 30.9°C (87.6°F) and lows at 19.8°C (67.6°F).

Heat index

October's heat index is appraised at a torrid 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In October, the average relative humidity is 67%.

Rainfall

In Nantes, in October, during 16.9 rainfall days, 121mm (4.76") of precipitation is typically accumulated. Throughout the year, there are 196.8 rainfall days, and 1260mm (49.61") of precipitation is accumulated.

Daylight

In Nantes, the average length of the day in October is 12h and 38min.
On the first day of the month, sunrise is at 06:04 and sunset at 18:24. On the last day of October, sunrise is at 05:40 and sunset at 18:36 -03.

Sunshine

In Nantes, the average sunshine in October is 8.7h.

UV index

The months with the highest UV index are January through March, June through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 6 in October translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.