September weather forecast
Porto Seguro, Brazil

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Weather in September

September debuts the initial signs of summer in Porto Seguro. There is a noticeable drop in rainfall to 33mm (1.3"), the lowest recorded during the year. A surge in visitors' influx to enjoy the beachside becomes apparent as the sea temperature begins to rise again. The general mood of the city becomes evidently vibrant, marking the commencement of the festive season. Solar protection remains crucial for residents and tourists due to the unchanged UV index of 6.

Temperature

With the start of September, Porto Seguro measures an average high-temperature of a still moderately hot 25.9°C (78.6°F), not significantly differing from August's 25.3°C (77.5°F). An average low-temperature of 21.5°C (70.7°F) characterizes Porto Seguro's September nights.

Humidity

January, February and September, with an average relative humidity of 78%, are the least humid months in Porto Seguro.

Rainfall

September is the month with the least rainfall. Rain falls for 16.9 days and accumulates 33mm (1.3") of precipitation.

Sea temperature

In Porto Seguro, in September, the average water temperature is 25.3°C (77.5°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

In September, the average length of the day in Porto Seguro is 12h and 1min.
On the first day of the month, sunrise is at 05:41 and sunset at 17:30. On the last day of September, sunrise is at 05:18 and sunset at 17:33 -03.

Sunshine

The average sunshine in September in Porto Seguro is 7.5h.

UV index

The months with the lowest UV index in Porto Seguro, Brazil, are April through October, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: A daily maximum UV index of 6 in September translates into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be attentive! The UV exposure is heightened with reflections from sand and water.
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Frequently asked questions

What are September temperatures in Porto Seguro?

In September, the average high-temperature and low-temperature in Porto Seguro, Brazil, are 25.9°C (78.6°F) and 21.5°C (70.7°F) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in May is computed to be 30°C (86°F).

What is the least humid month in Porto Seguro?

The months with the lowest humidity in Porto Seguro are January, February and September, with an average relative humidity of 78%.

What is the average humidity in September in Porto Seguro?

In September, the average relative humidity is 78%.

What is the driest month in Porto Seguro?

September is the month with the least rainfall in Porto Seguro. Rain falls for 16.9 days and accumulates 33mm (1.3") of precipitation.

How many days does it rain in September in Porto Seguro?

In Porto Seguro, during September, the rain falls for 16.9 days and regularly aggregates up to 33mm (1.3") of precipitation.

How warm is the water in September in Porto Seguro?

In Porto Seguro, in September, the average water temperature is 25.3°C (77.5°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Porto Seguro?

In September, the average day length in Porto Seguro, Brazil, is 12h and 1min.

When are sunrise and sunset in September in Porto Seguro?

On the first day of September, sunrise is at 05:41 and sunset at 17:30. On the last day of the month, sunrise is at 05:18 and sunset at 17:33 -03.

How long on average sun shines in September in Porto Seguro?

In Porto Seguro, the average sunshine duration in September is 7.5h.

When is the lowest UV index in Porto Seguro?

The months with the lowest UV index in Porto Seguro, Brazil, are April through October, with an average maximum UV index of 6.

What is the UV index intensity in September in Porto Seguro?

The average daily maximum UV index in September in Porto Seguro is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Porto Seguro, Brazil

Average temperature in September - Porto Seguro, Brazil
  • Average high temperature in September: 25.9°C

The warmest month (with the highest average high temperature) is March (29.2°C).
The month with the lowest average high temperature is August (25.3°C).

  • Average low temperature in September: 21.5°C

The months with the highest average low temperature are February and March (24.1°C).
The coldest month (with the lowest average low temperature) is August (20.8°C).

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Average pressure in September
Porto Seguro, Brazil

Average pressure in September - Porto Seguro, Brazil
  • Average pressure in September: 1018.1mbar

The month with the highest atmospheric pressure is July (1019.7mbar).
The month with the lowest atmospheric pressure is December (1012.9mbar).

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Average wind speed in September
Porto Seguro, Brazil

Average wind speed in September - Porto Seguro, Brazil
  • Average wind speed in September: 14.3km/h

The windiest month (with the highest average wind speed) is September (14.3km/h).
The calmest month (with the lowest average wind speed) is April (11.1km/h).

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Average humidity in September
Porto Seguro, Brazil

Average humidity in September - Porto Seguro, Brazil
  • Average humidity in September: 78%

The months with the highest relative humidity are April, June and November (81%).
The months with the lowest relative humidity are January, February and September (78%).

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Average rainfall in September
Porto Seguro, Brazil

Average rainfall in September - Porto Seguro, Brazil
  • Average rainfall in September: 33mm

The wettest month (with the highest rainfall) is March (114mm).
The driest month (with the least rainfall) is September (33mm).

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Average rainfall days in September
Porto Seguro, Brazil

Average rainfall days in September - Porto Seguro, Brazil
  • Average rainfall days in September: 16.9 days

The month with the highest number of rainy days is April (21.6 days).
The month with the least rainy days is September (16.9 days).

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Average sea temperature in September
Porto Seguro, Brazil

Average sea temperature in September - Porto Seguro, Brazil
  • Average sea temperature in September: 25.3°C

The best month for swimming (with the highest average sea temperature) is April (28.2°C).
The coldest month (with the lowest average sea temperature) is August (25.2°C).

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Average daylight in September /
Average sunshine in September
Porto Seguro, Brazil

Average daylight in September / Average sunshine in September - Porto Seguro, Brazil
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 12min).

  • Average sunshine in September: 7h and 3min

The month with the most sunshine is February (Average sunshine: 10h and 48min).
The month with the least sunshine is July (Average sunshine: 6h and 6min).

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Average sunshine days in September
Porto Seguro, Brazil

Average sunshine days in September - Porto Seguro, Brazil
  • Average sunshine days in September: 8.4 days

The months with the most sunshine days are August and December (9.8 days).
The month with the least sunshine days is April (5.5 days).

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Average UV index in September
Porto Seguro, Brazil

Average UV index in September - Porto Seguro, Brazil
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, November and December (UV index 7).
The months with the lowest UV index are April, May, June, July, August, September and October (UV index 6).

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Average cloud cover in September
Porto Seguro, Brazil

Average cloud cover in September - Porto Seguro, Brazil
  • Average cloud cover in September: 41

The month with the most cloud cover is November (Cloud cover 50).
The month with the least cloud cover is February (Cloud cover 33).

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Average visibility in September
Porto Seguro, Brazil

Average visibility in September - Porto Seguro, 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).

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Porto Seguro, Brazil

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