October weather forecast
São Fernando, Brazil

October in São Fernando, Brazil, is a sweltering spring month, with an average temperature varying between 23.4°C (74.1°F) and 35.4°C (95.7°F).

Temperature

The weather during October records an average high-temperature of a torrid 35.4°C (95.7°F), closely mirroring the preceding month. In São Fernando, a significant divergence from daytime highs is recorded, with average lows of 23.4°C (74.1°F) during October nights.

Heat index

The heat index value during October is calculated to be a blistering 42°C (107.6°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild 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 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In São Fernando, Brazil, the average relative humidity in October is 51%.

Rainfall

In São Fernando, during October, the rain falls for 2.5 days and regularly aggregates up to 4mm (0.16") of precipitation. Throughout the year, there are 122.6 rainfall days, and 442mm (17.4") of precipitation is accumulated.

Daylight

In October, the average length of the day in São Fernando is 12h and 15min.
On the first day of October in São Fernando, sunrise is at 05:13 and sunset at 17:23. On the last day of the month, sunrise is at 05:02 and sunset at 17:22 -03.

Sunshine

In São Fernando, Brazil, the average sunshine in October is 9.6h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in São Fernando. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 7 during October translates into the following directions:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.