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ArgentinaThe weather in September in Buenos Aires
It's pleasantly warm in September in Buenos Aires with an average temperature of 19°C. Temperatures this month range from a low of 16°C to a high of 22°C. At night, you can expect temperatures between 8°C and 13°C.
Looking for great weather? September is a good time to be in Buenos Aires. The temperatures are nice, and there’s 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 Buenos Aires, Argentina. 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 30°C in 2019, Buenos Aires reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 9°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 19°C.
Rainfall amount
In September, there is an average of 68 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for Buenos Aires
Click on any day in September to get detailed info about the usual weather on that day in Buenos Aires. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Buenos Aires | New York | |
|---|---|---|
| Average temperature | 19°C | 27°C |
| Max. temperature | 22°C | 31°C |
| Min. temperature | 8°C | -5°C |
| Total precipitation | 68 mm | 57 mm |
| Rainy days | 10 days | 9 days |
Start of September
The month of September starts in Buenos Aires with mild temps, averaging around 18°C during the day and nights around 9°C.
Mid September
By mid-September, daytime temps rise to around 21°C, with nights around 11°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 Buenos Aires is around 21°C, while nighttime temps are about 12°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Buenos Aires for all months and discover the best travel time
Curious about the weather in other parts of Argentina? Check out the climate and weather for spots like Patagonia, Ushuaia, Mendoza, or explore other destinations in Argentina.
Temperature charts
These charts show the average temperatures in September in Buenos Aires, Argentina. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Buenos Aires
Temperature in September in Buenos Aires over the years
Precipitation charts
These charts show the average amount of precipitation in September in Buenos Aires, Argentina. 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 Buenos Aires
Total precipitation in September in Buenos Aires over the years
Daily UV index in September in Buenos Aires
This chart shows the average daily UV index in September in Buenos Aires, 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 Buenos Aires
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Average weather in Buenos Aires by month
Click on a month below to see detailed weather info for Buenos Aires. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.