Normal weather for São Sebastião in September
It's warm in September in São Sebastião with an average temperature of 25°C. Temperatures this month range from a low of 24°C to a high of 26°C. At night, you can expect temperatures between 19°C and 21°C.
In September, there is an average of 62 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
São Sebastião in September |
New York | ||
|---|---|---|---|
 Average Temperature |
25°C | 27°C | |
 High Temp |
26°C | 31°C | |
| Low Temp |
24°C | 21°C | |
 Total Precipitation |
62 mm | 57 mm | |
| Rainy Days |
10 days | 9 days | |
Start of September
The month of September starts in São Sebastião with warm temps, averaging around 26°C during the day and nights around 21°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
With the temperature difference between day and night, it’s smart to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. In the evening and morning, a T-shirt, light pants or skirt, and a light jacket are ideal.
Mid September
By mid-September, daytime temps drop to around 25°C, with nights around 20°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
Since it cools down at night, it’s a good idea to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
End of September
By the end of September, the average daytime temperature in São Sebastião is around 25°C, while nighttime temps are about 20°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended. A T-shirt, light pants or skirt, and a light jacket are great for the day. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
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UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit São Sebastião?
Looking for great weather? September is a good time to be in São Sebastião. The temperatures are nice, and there’s not too much rain.
Temperature records for São Sebastião in September
Check out the climate of São Sebastião for all months and discover the best travel time
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Daily Temperature in September in São Sebastião
This chart shows the average daily high and low temperatures in September for São Sebastião, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in São Sebastião
The chart below shows the average daily precipitation in September for São Sebastião, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 10 days of precipitation in São Sebastião.
Daily UV Index in September in São Sebastião
This chart shows the average daily UV index in September in São Sebastião, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in São Sebastião Over the Years
This chart shows the average temperature in September in São Sebastião, measured in degrees Celsius, over the past few years.
Total Precipitation in September in São Sebastião Over the Years
This chart shows the average precipitation in September in São Sebastião, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for São Sebastião
Click on any day in September to get detailed info about the usual weather on that day in São Sebastião. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in São Sebastião
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Average Weather in São Sebastião by Month
Click on a month below to see detailed weather info for São Sebastião. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of São Sebastião for all months at once
