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
Antônio Martins's average high-temperature marks a still tropical 34.4°C (93.9°F) with the advent of September, closely mirroring that of the preceding month. In September, the temperature sees a substantial plunge from daytime highs to a low average of 21.3°C (70.3°F).Heat index
September's heat index is computed to be a fiery hot 39°C (102.2°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. 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 significant for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.
Humidity
In September, the average relative humidity is 50%.Rainfall
The month with the least rainfall is September, when the rain falls for 1.5 days and typically collects 1mm (0.04") of precipitation.Daylight
In September, the average length of the day is 12h and 5min.On the first day of September, sunrise is at 05:31 and sunset at 17:31. On the last day of the month, sunrise is at 05:16 and sunset at 17:26 -03.
Sunshine
September has the most sunshine of the year, with an average of 9.9h of sunshine.UV index
The months with the highest UV index are January through March, August through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 7 transforms into these recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
What month has the most sunshine?
How many hours of sunshine does Antônio Martins have in September?
When is the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Antônio Martins, Brazil
- Average high temperature in September: 34.4°C
The warmest month (with the highest average high temperature) is November (35.5°C).
The months with the lowest average high temperature are June and July (31.3°C).
- Average low temperature in September: 21.3°C
The months with the highest average low temperature are November and December (23.6°C).
The coldest month (with the lowest average low temperature) is July (19.8°C).
Average pressure in September
Antônio Martins, Brazil
- Average pressure in September: 1014.1mbar
The month with the highest atmospheric pressure is July (1015.5mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in September
Antônio Martins, Brazil
- Average wind speed in September: 17.6km/h
The windiest month (with the highest average wind speed) is October (18km/h).
The calmest month (with the lowest average wind speed) is April (9.9km/h).
Average humidity in September
Antônio Martins, Brazil
- Average humidity in September: 50%
The months with the highest relative humidity are April and May (71%).
The month with the lowest relative humidity is November (48%).
Average rainfall in September
Antônio Martins, Brazil
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (100mm).
The driest month (with the least rainfall) is September (1mm).
Average rainfall days in September
Antônio Martins, Brazil
- Average rainfall days in September: 1.5 days
The months with the highest number of rainy days are March and April (22.7 days).
The month with the least rainy days is September (1.5 days).
Average daylight in September /
Average sunshine in September
Antônio Martins, Brazil
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is September (Average sunshine: 9h and 54min).
The month with the least sunshine is March (Average sunshine: 8h and 42min).
Average sunshine days in September
Antônio Martins, Brazil
- Average sunshine days in September: 27.8 days
The month with the most sunshine days is September (27.8 days).
The month with the least sunshine days is April (6.7 days).
Average UV index in September
Antônio Martins, Brazil
- Average UV index in September: 7
The months with the highest UV index are January, February, March, August, September, October, November and December (UV index 7).
The months with the lowest UV index are April, May, June and July (UV index 6).
Average cloud cover in September
Antônio Martins, Brazil
- Average cloud cover in September: 14
The months with the most cloud cover are March and April (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 14).
Average visibility in September
Antônio Martins, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are April and May (9km).
