September weather forecast
Mendonça, Brazil

September, the first month of the spring in Mendonça, is a hot month, with temperature in the range of an average low of 19°C (66.2°F) and an average high of 32.2°C (90°F).

Temperature

September, with an average high of 32.2°C (90°F) and a low of 19°C (66.2°F), signifies the warmest month of the year.

Heat index

September's mean heat index is evaluated at a sweltering 35°C (95°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The months with the lowest humidity are August and September, with an average relative humidity of 52%.

Rainfall

In September, the rain falls for 8.9 days. Throughout September, 51mm (2.01") of precipitation is accumulated. Throughout the year, in Mendonça, there are 208.9 rainfall days, and 1257mm (49.49") of precipitation is accumulated.

Daylight

In Mendonça, Brazil, the average length of the day in September is 11h and 59min.
On the first day of the month, sunrise is at 06:26 and sunset at 18:09. On the last day of September, sunrise is at 05:59 and sunset at 18:16 -03.

Sunshine

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

UV index

January, March through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 6 in September translates into these instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.