September weather forecast
Calumbi, Brazil

The first month of the spring, September, is a hot month in Calumbi, Brazil, with an average temperature varying between 18.9°C (66°F) and 31.8°C (89.2°F).

Temperature

The advent of September denotes an average high-temperature of a tropical 31.8°C (89.2°F), subtly different from August's 29.9°C (85.8°F). September nights in Calumbi showcase a dramatic shift from daytime highs to an average temperature of 18.9°C (66°F).

Heat index

The heat index value for September is calculated to be a torrid 36°C (96.8°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In Calumbi, Brazil, the average relative humidity in September is 57%.

Rainfall

September is the month with the least rainfall in Calumbi. Rain falls for 2.5 days and accumulates 1mm (0.04") of precipitation.

Daylight

In September, the average length of the day in Calumbi is 12h and 4min.
On the first day of September, sunrise is at 05:33 and sunset at 17:31. On the last day of the month, sunrise is at 05:17 and sunset at 17:27 -03.

Sunshine

In September, the average sunshine in Calumbi is 9.1h.

UV index

The months with the highest UV index are February, March, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.