Temperatures in September
It's warm in September in Niterói with an average temperature of 28°C. Temperatures this month range from a low of 26°C to a high of 31°C. At night, you can expect temperatures between 20°C and 22°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Niterói in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Niterói with hot temperatures, averaging around 28°C during the day and nights close to 21°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-September
By mid-September, the average daytime temperature rises to around 29°C, with nights close to 22°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in Niterói will be around 28°C, with nights close to 21°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
As it gets cooler in the evening, it’s best to wear layers.
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Precipitation in September
In September, there is an average of 36 mm of precipitation, spread over 5 days. The wind speed is around 4 Bft, mostly coming from the South.
The precipitation chance averages 15% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Niterói. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Niterói in September |
London | ||
|---|---|---|---|
 Average Temperature |
28°C | 20°C | |
 High Temp |
31°C | 22°C | |
| Low Temp |
26°C | 17°C | |
 Total Precipitation |
36 mm | 44 mm | |
| Rainy Days |
5 days | 8 days | |
August
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 Niterói?
Want nice weather? Then September is a great time to be in Niterói. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Niterói in September
With 38°C, Niterói hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 18°C in 2015. The extreme night temperatures ranged from a low of 15°C to a high of 25°C.
Check out the climate of Niterói for all months and discover the best travel time
Curious about the climate in other parts of Brazil? Check out the weather and climate in places like Rio de Janeiro, Salvador, Pipa, or have a look at other destinations in Brazil.
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Daily Temperature in September in Niterói
This chart shows the average daily temperatures, both day and night, for each day in September in Niterói, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Niterói
The chart below shows the average daily precipitation in September for Niterói, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 5 days of rain in Niterói.
Daily UV Index in September in Niterói
This chart shows the average daily UV index in September in Niterói, 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 Niterói Over the Years
This chart shows the average temperature in September in Niterói, measured in degrees Celsius, over the past years.
Total Precipitation in September in Niterói Over the Years
This chart shows the average precipitation in September in Niterói, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Niterói
Click on a specific day in September for detailed info on the typical weather on that day in Niterói. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Niterói
Have you been to Niterói in September?
Share your weather experience in September in Niterói.
Average Weather in Niterói by Month
Click on a month below to see detailed weather info for Niterói. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
