October weather forecast
Serrana, Brazil

October, like September, is another tropical spring month in Serrana, Brazil, with an average temperature fluctuating between 19.5°C (67.1°F) and 30.5°C (86.9°F).

Temperature

The shift into October uncovers an average high-temperature of a still hot 30.5°C (86.9°F), subtly different from the previous month. Serrana observes an average nighttime temperature of 19.5°C (67.1°F) during October.

Heat index

For most parts of October, the heat index is computed to be a sweltering 35°C (95°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in October in Serrana is 67%.

Rainfall

In Serrana, Brazil, in October, it is raining for 20.3 days, with typically 136mm (5.35") of accumulated precipitation. In Serrana, Brazil, during the entire year, the rain falls for 221 days and collects up to 1294mm (50.94") of precipitation.

Daylight

The average length of the day in October is 12h and 35min.
On the first day of October in Serrana, Brazil, sunrise is at 05:50 and sunset at 18:09. On the last day of the month, sunrise is at 05:27 and sunset at 18:20 -03.

Sunshine

In October, the average sunshine in Serrana is 8.9h.

UV index

The months with the highest UV index in Serrana are January, March, July through November, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 6 in October translates into this advice:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.