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's arrival brings an average high-temperature of a hot 31.8°C (89.2°F), slightly deviating from August's 29.9°C (85.8°F). September nights experience a distinct temperature drop from the daily highs, with an average low-temperature of 18.9°C (66°F).Heat index
September's heat index is estimated at a torrid 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.Evaluating the heat index requires understanding its values in the shade and with gentle winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. 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.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
The average relative humidity in September is 57%.Rainfall
The month with the least rainfall is September, when the rain falls for 2.5 days and typically collects 1mm (0.04") of precipitation.Daylight
In September, the average length of the day is 12h and 4min.On the first day of September, sunrise is at 05:33 and sunset at 17:32. On the last day of the month, sunrise is at 05:18 and sunset at 17:28 -03.
Sunshine
In September, the average sunshine is 9.1h.UV index
February, March, September through December, with an average maximum UV index of 7, are months with the highest UV index in Santana de Mangueira. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 7 during September translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September in Santana de Mangueira?
What is the driest month?
How many days does it rain in September in Santana de Mangueira?
How many hours of daylight does Santana de Mangueira have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
When is the highest UV index?
What is the UV index reading in September?
Average temperature in September
Santana de Mangueira, Brazil
- Average high temperature in September: 31.8°C
The warmest month (with the highest average high temperature) is November (33.8°C).
The month with the lowest average high temperature is July (28.1°C).
- Average low temperature in September: 18.9°C
The month with the highest average low temperature is November (22.3°C).
The coldest months (with the lowest average low temperature) are July and August (17.3°C).
Average pressure in September
Santana de Mangueira, Brazil
- Average pressure in September: 1014.8mbar
The month with the highest atmospheric pressure is July (1016.3mbar).
The month with the lowest atmospheric pressure is November (1010.8mbar).
Average wind speed in September
Santana de Mangueira, Brazil
- Average wind speed in September: 18.4km/h
The windiest month (with the highest average wind speed) is September (18.4km/h).
The calmest month (with the lowest average wind speed) is March (10.6km/h).
Average humidity in September
Santana de Mangueira, Brazil
- Average humidity in September: 57%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is November (49%).
Average rainfall in September
Santana de Mangueira, Brazil
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (88mm).
The driest month (with the least rainfall) is September (1mm).
Average rainfall days in September
Santana de Mangueira, Brazil
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is September (2.5 days).
Average daylight in September /
Average sunshine in September
Santana de Mangueira, 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 1min
The month with the most sunshine is October (Average sunshine: 9h and 24min).
The month with the least sunshine is July (Average sunshine: 7h and 0min).
Average sunshine days in September
Santana de Mangueira, Brazil
- Average sunshine days in September: 25.6 days
The month with the most sunshine days is September (25.6 days).
The month with the least sunshine days is February (8 days).
Average UV index in September
Santana de Mangueira, Brazil
- Average UV index in September: 7
The months with the highest UV index are February, March, September, October, November and December (UV index 7).
The months with the lowest UV index are January, April, May, June, July and August (UV index 6).
Average cloud cover in September
Santana de Mangueira, Brazil
- Average cloud cover in September: 24
The month with the most cloud cover is July (Cloud cover 47).
The months with the least cloud cover are September and October (Cloud cover 24).
Average visibility in September
Santana de Mangueira, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The month with the lowest visibility is May (8km).
