Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September, noted for its average high-temperature of 33.3°C (91.9°F) and an average low-temperature of 20.2°C (68.4°F), is considered the warmest month.Heat index
For most parts of September, the heat index is evaluated at a very hot 36°C (96.8°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.Understanding the heat index involves considering values for shaded locales with light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
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. In Três Fronteiras, during the entire year, the rain falls for 209.8 days and collects up to 1277mm (50.28") of precipitation.Daylight
In September, the average length of the day is 11h and 59min.On the first day of the month, sunrise is at 06:31 and sunset at 18:15. On the last day of September, sunrise is at 06:05 and sunset at 18:21 -03.
Sunshine
The average sunshine in September 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 risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest?
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September in Três Fronteiras?
How many hours of sunshine does Três Fronteiras have in September?
What is the month with the highest UV index?
What is the UV index reading in September?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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).
