September weather forecast
Belterra, Brazil

September, the first month of the spring in Belterra, is still a tropical month, with an average temperature varying between 25.6°C (78.1°F) and 33.2°C (91.8°F).

Temperature

The shift into September uncovers an average high-temperature of a still tropical 33.2°C (91.8°F), subtly different from the previous month. Nighttime temperatures in Belterra hover around an average low of 25.6°C (78.1°F) in September.

Heat index

The average heat index in September is computed to be a blistering 42°C (107.6°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. 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 quite important for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

September is the least humid month, with an average relative humidity of 65%.

Rainfall

In Belterra, in September, during 13.8 rainfall days, 40mm (1.57") of precipitation is typically accumulated. Throughout the year, there are 259 rainfall days, and 2314mm (91.1") of precipitation is accumulated.

Daylight

In Belterra, the average length of the day in September is 12h and 6min.
On the first day of the month, sunrise is at 06:37 and sunset at 18:41. On the last day of September, sunrise is at 06:25 and sunset at 18:33 -03.

Sunshine

The month with the most sunshine in Belterra is September, with an average of 9.8h of sunshine.

UV index

The months with the highest UV index in Belterra are January, May through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.