September weather forecastGraça, Brazil

Weather in September

September, the first month of the spring in Graça, is also a hot month, with an average temperature ranging between min 20.7°C (69.3°F) and max 33.9°C (93°F).

Temperature

September's arrival shows an average high-temperature of a still hot 33.9°C (93°F), hardly different from the previous month. Despite considerable daily temperature swings, a steady low-temperature average of 20.7°C (69.3°F) is noted throughout September.

Heat index

The heat index value during September is estimated at a scorching 40°C (104°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
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. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The least humid month is September, with an average relative humidity of 56%.

Rainfall

September is the month with the least rainfall. Rain falls for 4.4 days and accumulates 4mm (0.16") of precipitation.

Daylight

In Graça, 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 Graça, sunrise is at 05:28 and sunset at 17:37 -03.

Sunshine

With an average of 9.5h of sunshine, September has the most sunshine of the year.

UV index

July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.