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Argentina weather in September 2025
Expect daytime maximum temperatures of 19°C in Argentina in September based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 69 mm of rainfall in the month.
- 19°C max day temperature
19 - 6 hours of sunshine per day
- 7 days with some rainfall
7 - 10°C min night temperature
10 - 12 hours of daylight per day
12 - No heat & humidity
0 - 69 mm of monthly rainfall
69 - 6 (High) UV index
6 - 15°C sea temperature
15
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The September weather guide for Argentina (Buenos Aires) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Argentina destinations
Below are average maximum temperatures at popular countries, regions and places in Argentina in September. Select a holiday destination to see more weather parameters.
All Argentina destinations
- Bahia Blanca
- Buenos Aires
- Comodoro Rivadavia
- Cordoba
- El Calafate
- Iguazu Falls
- Mar del Plata
- Mendoza
- Rosario
- Salta
- San Carlos de Bariloche
- San Miguel de Tucuman
- Ushuaia
Metric (°C / mm) | Imperial (°F / inches)
More about Argentina
How hot is it in Argentina in September?
Daytime temperatures usually reach 19°C in Buenos Aires, Argentina in September, falling to 10°C at night.
How sunny is it in Argentina in September?
There are normally 6 hours of bright sunshine each day in Buenos Aires, Argentina in September - that's 54% of daylight hours.
How warm is the sea around Argentina in September?
The average sea temperature around Buenos Aires, Argentina in September is 15°C.
Does it rain in Argentina in September?
There are usually 7 days with some rain in Buenos Aires, Argentina in September and the average monthly rainfall is 69mm.
Argentina September sunrise & sunset times
Browse the sunrise and sunset times for Argentina in September 2025. Select a month to view Argentina sunrise and sunset times for the next 12 months. The Argentina sunrise and sunset times shown below are for Buenos Aires.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 07:12 | 18:35 |
| Monday, 15th September 2025 | 06:53 | 18:45 |
| Tuesday, 30th September 2025 | 06:31 | 18:56 |
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