September weather forecast
Três Fronteiras, Brazil

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Weather in September

September, the first month of the spring in Três Fronteiras, is also a hot month, with an average temperature ranging between max 33.3°C (91.9°F) and min 20.2°C (68.4°F).

Temperature

In Três Fronteiras, September records the highest average temperatures, peaking at 33.3°C (91.9°F) and reaching a low of 20.2°C (68.4°F).

Heat index

The heat index in September is appraised at a fiery hot 36°C (96.8°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In Três Fronteiras, the average relative humidity in September is 48%.

Rainfall

In September, in Três Fronteiras, the rain falls for 8.5 days. Throughout September, 47mm (1.85") of precipitation is accumulated. Throughout the year, there are 209.8 rainfall days, and 1277mm (50.28") of precipitation is accumulated.

Daylight

The average length of the day in September in Três Fronteiras is 11h and 59min.
On the first day of September in Três Fronteiras, Brazil, sunrise is at 06:31 and sunset at 18:15. On the last day of the month, sunrise is at 06:05 and sunset at 18:21 -03.

Sunshine

In September, the average sunshine in Três Fronteiras is 9.4h.

UV index

The months with the highest UV index are August through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 7 during September translates into the following guidance:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Updated: Feb 2, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What part of the year is the hottest in Três Fronteiras?

September tends to be the warmest month, with temperatures averaging a daily high of 33.3°C (91.9°F) and a low of 20.2°C (68.4°F).

How hot does it get in Três Fronteiras in September?

In Três Fronteiras, 33.3°C (91.9°F) is the average high-temperature and 20.2°C (68.4°F) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 36°C (96.8°F).

What is the average humidity in September in Três Fronteiras?

In September, the average relative humidity in Três Fronteiras, Brazil, is 48%.

How many days does it rain in September in Três Fronteiras?

In September, the rain falls for 8.5 days. Throughout September, 47mm (1.85") of precipitation is accumulated.

What is the average length of the day in September in Três Fronteiras?

In Três Fronteiras, Brazil, the average day length in September is 11h and 59min.

When are sunrise and sunset in September in Três Fronteiras?

In September, on the first day of the month, sunrise is at 06:31 and sunset at 18:15. On the last day of the month, sunrise is at 06:05 and sunset at 18:21 -03.

How many hours of sunshine does Três Fronteiras have in September?

In Três Fronteiras, Brazil, the average sunshine duration in September is 9.4h.

What are the months with the highest UV index in Três Fronteiras?

The months with the highest UV index in Três Fronteiras are August through October, with an average maximum UV index of 7.

How high is the UV index in September in Três Fronteiras?

In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.

Average temperature in September
Três Fronteiras, Brazil

Average temperature in September - Três Fronteiras, Brazil
  • Average high temperature in September: 33.3°C

The warmest month (with the highest average high temperature) is September (33.3°C).
The month with the lowest average high temperature is June (25.9°C).

  • Average low temperature in September: 20.2°C

The month with the highest average low temperature is December (21.7°C).
The coldest month (with the lowest average low temperature) is June (16.4°C).

Average pressure in September
Três Fronteiras, Brazil

Average pressure in September - Três Fronteiras, Brazil
  • Average pressure in September: 1013.4mbar

The month with the highest atmospheric pressure is July (1017.5mbar).
The month with the lowest atmospheric pressure is November (1009.6mbar).

Average wind speed in September
Três Fronteiras, Brazil

Average wind speed in September - Três Fronteiras, Brazil
  • Average wind speed in September: 10km/h

The windiest month (with the highest average wind speed) is August (10.2km/h).
The calmest months (with the lowest average wind speed) are February and March (6.7km/h).

Average humidity in September
Três Fronteiras, Brazil

Average humidity in September - Três Fronteiras, Brazil
  • Average humidity in September: 48%

The month with the highest relative humidity is March (86%).
The month with the lowest relative humidity is August (47%).

Average rainfall in September
Três Fronteiras, Brazil

Average rainfall in September - Três Fronteiras, Brazil
  • Average rainfall in September: 47mm

The wettest month (with the highest rainfall) is January (219mm).
The driest months (with the least rainfall) are July and August (8mm).

Average rainfall days in September
Três Fronteiras, Brazil

Average rainfall days in September - Três Fronteiras, Brazil
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is January (29.3 days).
The month with the least rainy days is August (3.6 days).

Average daylight in September /
Average sunshine in September
Três Fronteiras, Brazil

Average daylight in September / Average sunshine in September - Três Fronteiras, Brazil
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 18min).
The month with the shortest days is June (Average daylight: 10h and 54min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 7h and 6min).

Average sunshine days in September
Três Fronteiras, Brazil

Average sunshine days in September - Três Fronteiras, Brazil
  • Average sunshine days in September: 20.2 days

The month with the most sunshine days is August (26.8 days).
The months with the least sunshine days are January and February (1.3 days).

Average UV index in September
Três Fronteiras, Brazil

Average UV index in September - Três Fronteiras, Brazil
  • Average UV index in September: 7

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

Average cloud cover in September
Três Fronteiras, Brazil

Average cloud cover in September - Três Fronteiras, Brazil
  • Average cloud cover in September: 17

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in September
Três Fronteiras, Brazil

Average visibility in September - Três Fronteiras, Brazil
  • Average visibility in September: 10km

The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March, April, May and December (8km).

Três Fronteiras, Brazil

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