October weather forecast
Teresina, Brazil

October marks the end of the dry season and the beginning of increased precipitation in Teresina. Rainfall starts to climb, yet temperatures remain high, almost at the year's peak. The city notes a noticeable jump in precipitation levels to 32mm (1.26"), signaling the onset of the rainy spell. Although the weather gets wetter, the humidity and temperature levels remain comfortable. Thus, Teresina in October is characterized by a slight increase in rainfall, warm temperatures, and stable humidity.

Temperature

In Teresina, the month of October registers the highest temperatures, averaging 36.7°C (98.1°F) at the peak and 23.9°C (75°F) at the lowest.

Heat index

October's heat index is calculated to be a life-threatening hot 46°C (114.8°F). Keep on guard: Heat exhaustion and heat cramps are probable. Heatstroke is a possible danger with ongoing physical activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In Teresina, the average relative humidity in October is 53%.

Rainfall

In Teresina, Brazil, in October, it is raining for 11.5 days, with typically 32mm (1.26") of accumulated precipitation. In Teresina, during the entire year, the rain falls for 207.4 days and collects up to 1348mm (53.07") of precipitation.

Daylight

In Teresina, Brazil, the average length of the day in October is 12h and 13min.
On the first day of the month, sunrise is at 05:35 and sunset at 17:45. On the last day of October, in Teresina, sunrise is at 05:26 and sunset at 17:43 -03.

Sunshine

In Teresina, the average sunshine in October is 9.2h.

UV index

The months with the highest UV index in Teresina are January, March through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in October converts into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Enhance your sun protection with tightly woven, yet airy clothing.