Temperatures in September
It's hot in September in Rio Negro with an average temperature of 35°C. Temperatures this month range from a low of 32°C to a high of 38°C. At night, you can expect temperatures between 20°C and 24°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Rio Negro 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 Rio Negro with hot temperatures, averaging around 35°C during the day and nights close to 21°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature rises to around 36°C, with nights close to 22°C. There might be a few showers during this period, but plenty of dry days with sunshine too. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of September
By the end of September, the average daytime temperature in Rio Negro will be around 36°C, with nights close to 23°C. A shower might show up, but overall the weather will be dry and sunny. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
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Precipitation in September
In September, there is an average of 44 mm of precipitation, spread over 6 days. The wind speed is around 3 Bft, mostly coming from the South.
The precipitation chance averages 19% 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 Rio Negro. 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.
Rio Negro in September |
London | ||
|---|---|---|---|
 Average Temperature |
35°C | 20°C | |
 High Temp |
38°C | 22°C | |
| Low Temp |
32°C | 17°C | |
 Total Precipitation |
44 mm | 44 mm | |
| Rainy Days |
6 days | 8 days | |
August
UV index
The UV index is a maximum of 9 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 Rio Negro?
September is a great month to be in Rio Negro for sunny weather. You’ll get high temperatures and not too much rain this month.
Temperature records for Rio Negro in September
With 43°C, Rio Negro hit the highest temperature in the last 10 years in September 2020. The lowest daytime temperature in this month was 12°C in 2016. The extreme night temperatures ranged from a low of 7°C to a high of 30°C.
Check out the climate of Rio Negro 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 Rio Negro
This chart shows the average daily temperatures, both day and night, for each day in September in Rio Negro, 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 Rio Negro
The chart below shows the average daily precipitation in September for Rio Negro, 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 6 days of rain in Rio Negro.
Daily UV Index in September in Rio Negro
This chart shows the average daily UV index in September in Rio Negro, 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 Rio Negro Over the Years
This chart shows the average temperature in September in Rio Negro, measured in degrees Celsius, over the past years.
Total Precipitation in September in Rio Negro Over the Years
This chart shows the average precipitation in September in Rio Negro, 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 Rio Negro
Click on a specific day in September for detailed info on the typical weather on that day in Rio Negro. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Rio Negro
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Average Weather in Rio Negro by Month
Click on a month below to see detailed weather info for Rio Negro. 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 Rio Negro for all months at once
