October weather forecast
São Francisco do Piauí, Brazil

October, the same as September, is a very hot spring month in São Francisco do Piauí, Brazil, with temperature in the range of an average low of 25.2°C (77.4°F) and an average high of 36.9°C (98.4°F).

Temperature

The temperatures reach their highest averages in October, with highs of 36.9°C (98.4°F) and lows of 25.2°C (77.4°F).

Heat index

For most parts of October, the heat index is computed to be a blisteringly hot 42°C (107.6°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. 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. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In São Francisco do Piauí, the average relative humidity in October is 42%.

Rainfall

In São Francisco do Piauí, during October, the rain falls for 8 days and regularly aggregates up to 34mm (1.34") of precipitation. Throughout the year, in São Francisco do Piauí, Brazil, there are 159.4 rainfall days, and 844mm (33.23") of precipitation is accumulated.

Daylight

In São Francisco do Piauí, the average length of the day in October is 12h and 16min.
On the first day of October in São Francisco do Piauí, Brazil, sunrise is at 05:34 and sunset at 17:44. On the last day of the month, sunrise is at 05:22 and sunset at 17:44 -03.

Sunshine

In São Francisco do Piauí, Brazil, the average sunshine in October is 9.2h.

UV index

The average daily maximum UV index in October is 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum daily UV index of 7 during October morphs into the following directions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.