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BrazilThe weather in September in Rio Negro
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.
September is a good month to be in Rio Negro for sunny weather. You’ll have high temperatures and not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Rio Negro, Brazil. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 43°C in 2020, Rio Negro reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2016. The extreme nighttime temperatures ranged from a lowest recorded value of 7°C to a highest value of 30°C.
Rainfall amount
In September, there is an average of 44 mm of precipitation, spread over 7 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for Rio Negro
Click on any day in September to get detailed info about the usual weather on that day in Rio Negro. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Rio Negro | New York | |
|---|---|---|
| Average temperature | 35°C | 27°C |
| Max. temperature | 38°C | 31°C |
| Min. temperature | 20°C | -5°C |
| Total precipitation | 44 mm | 57 mm |
| Rainy days | 7 days | 9 days |
Start of September
The month of September starts in Rio Negro with hot temps, averaging around 35°C during the day and nights around 21°C.
Mid September
By mid-September, daytime temps rise to around 36°C, with nights around 22°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Rio Negro is around 36°C, while nighttime temps are about 23°C. A shower might pop up, but overall, the weather will be dry and sunny.
Find affordable trips to Rio Negro
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.
Check out the climate of Rio Negro for all months and discover the best travel time
Curious about the weather in other parts of Brazil? Check out the climate and weather for spots like Rio de Janeiro, Salvador, Pipa, or explore other destinations in Brazil.
Temperature charts
These charts show the average temperatures in September in Rio Negro, Brazil. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Rio Negro
Temperature in September in Rio Negro over the years
Precipitation charts
These charts show the average amount of precipitation in September in Rio Negro, Brazil. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Rio Negro
Total precipitation in September in Rio Negro over the years
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.
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.