September weather forecast
Crateús, Brazil

The first month of the spring, September, is also a hot month in Crateús, Brazil, with an average temperature fluctuating between 22.3°C (72.1°F) and 34.8°C (94.6°F).

Temperature

September commences with an average high-temperature of a still tropical 34.8°C (94.6°F), showing little deviation from August's 33.8°C (92.8°F). A significant temperature decrease to an average an agreeable 22.3°C (72.1°F) characterizes Crateús's nighttime temperatures during September.

Heat index

In September, the average heat index is calculated to be a torrid 39°C (102.2°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The least humid month in Crateús is September, with an average relative humidity of 46%.

Rainfall

August and September are months with the least rain in Crateús when the rain falls for 2.9 days and typically aggregates up to 3mm (0.12") of rain.

Daylight

In Crateús, the average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 05:41 and sunset at 17:43. On the last day of September, in Crateús, sunrise is at 05:27 and sunset at 17:37 -03.

Sunshine

The months with the most sunshine in Crateús, Brazil, are January, August and September, with an average of 9.7h of sunshine.

UV index

The months with the highest UV index in Crateús are April, July through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 7 during September leads to these advisories:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.