September weather forecastJanuária, Brazil

Weather in September

September, the first month of the spring in Januária, is also a hot month, with an average temperature varying between 18.7°C (65.7°F) and 32.9°C (91.2°F).

Temperature

Januária's temperatures peak on average in September, reaching 32.9°C (91.2°F) at their highest and 18.7°C (65.7°F) at their lowest.

Heat index

The heat index in September is appraised at a sweltering 35°C (95°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. 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. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

In Januária, in September, during 3.1 rainfall days, 6mm (0.24") of precipitation is typically accumulated. Throughout the year, in Januária, there are 145.3 rainfall days, and 689mm (27.13") of precipitation is accumulated.

Daylight

In September, the average length of the day in Januária is 12h and 1min.
On the first day of September in Januária, sunrise is at 06:02 and sunset at 17:51. On the last day of the month, sunrise is at 05:40 and sunset at 17:54 -03.

Sunshine

September has the most sunshine of the year in Januária, with an average of 9.8h of sunshine.

UV index

The months with the highest UV index in Januária are August and September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the UV index of 7 transforms into the following advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.