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
Weather in September
Temperature
São João da Barra experiences a minor change to a still moderately hot 24.9°C (76.8°F) in average high-temperature during September, closely reflecting August. Night temperatures in September exhibit a subtle decrease, settling at an average of 20.6°C (69.1°F).Humidity
In September, the average relative humidity in São João da Barra, Brazil, is 78%.Rainfall
In September, the rain falls for 10.9 days. Throughout September, 36mm (1.42") of precipitation is accumulated. In São João da Barra, during the entire year, the rain falls for 169.1 days and collects up to 753mm (29.65") of precipitation.Daylight
The average length of the day in September is 11h and 59min.On the first day of the month, sunrise is at 05:53 and sunset at 17:34. On the last day of September, in São João da Barra, sunrise is at 05:25 and sunset at 17:42 -03.
Sunshine
In September, the average sunshine is 8.1h.UV index
The months with the lowest UV index are March through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are September temperatures in São João da Barra?
What is the average humidity in September in São João da Barra?
How much does it rain in São João da Barra in September?
What is the average length of the day in September in São João da Barra?
When is the sunrise / sunset in September in São João da Barra?
How many hours of sunshine does São João da Barra have in September?
What is the month with the lowest UV index in São João da Barra?
What is the UV index reading in September in São João da Barra?
Average temperature in September
São João da Barra, Brazil
- Average high temperature in September: 24.9°C
The warmest month (with the highest average high temperature) is February (28.9°C).
The month with the lowest average high temperature is August (23.9°C).
- Average low temperature in September: 20.6°C
The month with the highest average low temperature is February (24.1°C).
The coldest months (with the lowest average low temperature) are July and August (20°C).
Average pressure in September
São João da Barra, Brazil
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is July (1020.8mbar).
The month with the lowest atmospheric pressure is December (1012.4mbar).
Average wind speed in September
São João da Barra, Brazil
- Average wind speed in September: 19.6km/h
The windiest month (with the highest average wind speed) is September (19.6km/h).
The calmest month (with the lowest average wind speed) is April (12.6km/h).
Average humidity in September
São João da Barra, Brazil
- Average humidity in September: 78%
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
São João da Barra, Brazil
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is November (128mm).
The driest month (with the least rainfall) is July (21mm).
Average rainfall days in September
São João da Barra, Brazil
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is June (10.1 days).
Average daylight in September /
Average sunshine in September
São João da Barra, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is February (Average sunshine: 9h and 6min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).
Average sunshine days in September
São João da Barra, Brazil
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is July (18.1 days).
The month with the least sunshine days is November (8.8 days).
Average UV index in September
São João da Barra, Brazil
- Average UV index in September: 6
The months with the highest UV index are January and February (UV index 7).
The months with the lowest UV index are March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
São João da Barra, Brazil
- Average cloud cover in September: 34
The month with the most cloud cover is November (Cloud cover 49).
The month with the least cloud cover is February (Cloud cover 27).
Average visibility in September
São João da Barra, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
São João da Barra, Brazil
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