South Brazil weather in September 2025
South Brazil weather in September 2025
Day
21 °C
Night
14 °C
Sea
18 °C
Precipitation
141 mm
in month
Rainy days
14 days
in month
Daylight
12 hours
average
Sunshine
4 hours
average
Humidity
84 %
Day
21 °C
Night
14 °C
Sea
18 °C
Precipitation
141 mm
in month
Rainy days
14 days
in month
Daylight
12 hours
average
Sunshine
4 hours
average
Humidity
84 %
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Weather overview and FAQs
Weather overview
In South Brazil in September, the average air temperature ranges from 21 °C (69 °F) during the day to 14 °C (57 °F) at night. There are 14 days of rain on average, where the rainfall is 141 mm (5.56 in).
Is September a good month to visit South Brazil?
There are good conditions for visiting in South Brazil in September. Especially for non-beach activities, such as hiking or sightseeing. The temperature during the day will be nice 21 °C (69 °F). A sea temperature of 18 °C (65 °F) can seem colder to some, but others will call it refreshing. The temperature of 14 °C (57 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the temperature in South Brazil during the day in September?
In South Brazil in September, the average daily temperatures will be 21 °C (69 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
What is the rainfall intensity in September in South Brazil?
In South Brazil in September, there is 141 mm (5.56 in) rainfall, which means on average 5 mm (0.19 in) rainfall per day.
What is the sea temperature in September in South Brazil?
The temperature of the sea in South Brazil in September is 18 °C (65 °F). At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions.
What is the average number of rainy days in South Brazil in September?
In September in South Brazil, we can expect 14 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 3.2 days of the week, or in general - 46 % days.
How long is the day (from dawn till dusk) in South Brazil in September?
The length of daylight in South Brazil in September is 12 hours.
What is the night temperature in September in South Brazil?
The average night temperature in South Brazil in September is 14 °C (57 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
How many hours of sun to expect in September in South Brazil?
In September in South Brazil, you can expect around 4 hours of sunshine.
How windy is it in September in South Brazil?
An average wind scale that can be expected in South Brazil in September is 3.
Is the sea in South Brazil warmer in September than in October?
No, the sea temperature in September in South Brazil is not higher than in October.
What is the humidity in South Brazil in September?
Humidity in South Brazil in September is 84 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.
Is South Brazil rainier in September than in August?
Yes, in September in South Brazil it rains more than in August.
Is the weather in South Brazil warmer in September than in August?
Yes, in September in South Brazil it is warmer than in August by 1 °C (33 °F).
Is the temperature rising or falling in the course of time in South Brazil in September?
Over the course of September in South Brazil, the temperatures are rising from 20 °C (69 °F) at the beginning of the month to 22 °C (71 °F) at the end of the month.
How does the sea temperature evolve during the month in South Brazil in September?
The sea temperature during September in South Brazil has an increasing tendency from 18 °C (64 °F) at the beginning of the month to 19 °C (66 °F) at the end of the month.