September weather forecast
Colinas do Tocantins, Brazil

September

Weather in September

The first month of the spring, September, is also a sweltering month in Colinas do Tocantins, Brazil, with an average temperature fluctuating between 23.8°C (74.8°F) and 37.2°C (99°F).

Temperature

In Colinas do Tocantins, the peak average temperatures are observed in September, with a high of 37.2°C (99°F) and a low of 23.8°C (74.8°F).

Heat index

September's mean heat index is estimated at a blistering 42°C (107.6°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The months with the lowest humidity in Colinas do Tocantins, Brazil, are August and September, with an average relative humidity of 40%.

Rainfall

In Colinas do Tocantins, during September, the rain falls for 4.6 days and regularly aggregates up to 8mm (0.31") of precipitation. Throughout the year, in Colinas do Tocantins, there are 213.3 rainfall days, and 1154mm (45.43") of precipitation is accumulated.

Daylight

The average length of the day in September in Colinas do Tocantins is 12h and 4min.
On the first day of the month, sunrise is at 06:14 and sunset at 18:12. On the last day of September, sunrise is at 05:58 and sunset at 18:08 -03.

Sunshine

In September, the average sunshine is 9.6h.

UV index

May through September and November, 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 risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.

Frequently asked questions

What is the warmest month?
The month of September sees the average highest temperatures, reaching 37.2°C (99°F) at the peak and 23.8°C (74.8°F) at the low.
How hot does it get in September?
The average high-temperature and low-temperature during September are 37.2°C (99°F) and 23.8°C (74.8°F) respectively. In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is estimated at 42°C (107.6°F).
What is the least humid month?
The months with the lowest humidity are August and September, with an average relative humidity of 40%.
What is the average humidity in September?
In September, the average relative humidity is 40%.
How many days does it rain in September?
In Colinas do Tocantins, in September, during 4.6 rainfall days, 8mm (0.31") of precipitation is typically accumulated.
How many hours of daylight does Colinas do Tocantins have in September?
The average day length in September is 12h and 4min.
When are sunrise and sunset in September?
In September, on the first day of the month, sunrise is at 06:14 and sunset at 18:12. On the last day of the month, sunrise is at 05:58 and sunset at 18:08 -03.
How long on average sun shines in September?
In September, the average sunshine duration is 9.6h.
When is the highest UV index in Colinas do Tocantins?
May through September and November, with an average maximum UV index of 7, are months with the highest UV index.
How high is the UV index in September?
In Colinas do Tocantins, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Colinas do Tocantins, Brazil
  • Average high temperature in September: 37.2°C

The warmest month (with the highest average high temperature) is September (37.2°C).
The month with the lowest average high temperature is February (30.4°C).

  • Average low temperature in September: 23.8°C

The month with the highest average low temperature is September (23.8°C).
The coldest month (with the lowest average low temperature) is July (20.3°C).

Average pressure in September
Colinas do Tocantins, Brazil
  • Average pressure in September: 1010.7mbar

The months with the highest atmospheric pressure are June and July (1013.4mbar).
The month with the lowest atmospheric pressure is November (1009.1mbar).

Average wind speed in September
Colinas do Tocantins, Brazil
  • Average wind speed in September: 6.5km/h

The windiest month (with the highest average wind speed) is August (6.7km/h).
The calmest month (with the lowest average wind speed) is March (4.2km/h).

Average humidity in September
Colinas do Tocantins, Brazil
  • Average humidity in September: 40%

The months with the highest relative humidity are February and March (85%).
The months with the lowest relative humidity are August and September (40%).

Average rainfall in September
Colinas do Tocantins, Brazil
  • Average rainfall in September: 8mm

The wettest month (with the highest rainfall) is March (204mm).
The driest month (with the least rainfall) is August (1mm).

Average rainfall days in September
Colinas do Tocantins, Brazil
  • Average rainfall days in September: 4.6 days

The month with the highest number of rainy days is March (29.6 days).
The month with the least rainy days is August (0.6 days).

Average daylight in September /
Average sunshine in September
Colinas do Tocantins, Brazil
  • Average daylight in September: 12h and 1min

The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is October (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).

Average sunshine days in September
Colinas do Tocantins, Brazil
  • Average sunshine days in September: 23.7 days

The month with the most sunshine days is August (30.3 days).
The month with the least sunshine days is March (0.6 days).

Average UV index in September
Colinas do Tocantins, Brazil
  • Average UV index in September: 7

The months with the highest UV index are May, June, July, August, September and November (UV index 7).
The months with the lowest UV index are January, February, March, April, October and December (UV index 6).

Average cloud cover in September
Colinas do Tocantins, Brazil
  • Average cloud cover in September: 20

The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 13).

Average visibility in September
Colinas do Tocantins, Brazil
  • Average visibility in September: 10km

The months with the highest visibility are June, July, August, September and October (10km).
The month with the lowest visibility is February (7km).

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