September weather forecast
Icó, Brazil

The first month of the spring, September, is a very hot month in Icó, Brazil, with an average temperature fluctuating between 22.3°C (72.1°F) and 35.1°C (95.2°F).

Temperature

September's commencement is accompanied by an average high-temperature of a sweltering 35.1°C (95.2°F), diverging marginally from August's 33.7°C (92.7°F). During September, the nighttime temperature presents a clear descent from the daily peaks, falling to an average of 22.3°C (72.1°F).

Heat index

The heat index for September is estimated at a torrid 39°C (102.2°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

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

Rainfall

The month with the least rainfall is September, when the rain falls for 3.9 days and typically collects 3mm (0.12") of precipitation.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of September in Icó, sunrise is at 05:35 and sunset at 17:35. On the last day of the month, sunrise is at 05:20 and sunset at 17:30 -03.

Sunshine

August and September, with an average of 9.7h of sunshine, are months with the most sunshine in Icó.

UV index

January, March, April, July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The UV index of 7 during September translates into the following guidance:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.