September weather forecast
Tutóia, Brazil

The first month of the spring, September, is still a tropical month in Tutóia, Brazil, with temperature in the range of an average high of 31.5°C (88.7°F) and an average low of 25°C (77°F).
An excellent water temperature of 26.9°C (80.4°F) and only 5.2 rainfall days, with 9mm (0.35") of accumulated rainfall, makes September a prime for swimming and other water activities.

Temperature

September begins with an average high-temperature of a still hot 31.5°C (88.7°F), reflecting close similarity to the preceding month. Nighttime temperature experiences an average drop to a warm 25°C (77°F) in September.

Heat index

The heat index value for September is appraised at a fiery hot 39°C (102.2°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

With an average relative humidity of 71%, September is the least humid month.

Rainfall

In Tutóia, in September, during 5.2 rainfall days, 9mm (0.35") of precipitation is typically accumulated. In Tutóia, during the entire year, the rain falls for 225.4 days and collects up to 1281mm (50.43") of precipitation.

Sea temperature

September is the month with the coldest seawater in Tutóia, with an average sea temperature of 26.9°C (80.4°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

The average length of the day in September in Tutóia is 12h and 6min.
On the first day of the month, sunrise is at 05:47 and sunset at 17:50. On the last day of September, sunrise is at 05:34 and sunset at 17:42 -03.

Sunshine

In Tutóia, the average sunshine in September is 9.4h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Tutóia. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Notice! Sand and water reflections contribute to a stronger UV exposure.