Buenos Aires weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Excellent
Best time to visit: September – May
What is the weather like in Buenos Aires in October?
In October, Buenos Aires is mild: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 18.7 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain falls on about 9 days, adding up to 95 mm. All in all, October is an excellent month for a holiday in Buenos Aires.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 84 | 83 | 90 |
| Day | 17° | 21° | 24° |
| Night | 11° | 13° | 16° |
| Sea | 16° | 19° | 22° |
| Sun | 7 h | 7 h | 9 h |
| Rain days | 6 | 9 | 8 |
More details for October
- Daylight
- 12 h 54 min06:12 – 19:06
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or more
- Wind
- 21 km/haverage daily peak
- Cloud cover
- 51 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−3America/Argentina/Buenos_Aires
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %68 %
- Few rainy daysweight 30 %66 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Buenos Aires in October: quick answers
Is Buenos Aires hot in October?
No. In October, Buenos Aires is mild: daytime highs average 21 °C and nights drop to about 13 °C.
Can you swim in Buenos Aires in October?
Only if you don't mind cold water: in October the sea averages just 18.7 °C. Comfortable swimming is possible from November to April.
Does it rain much in Buenos Aires in October?
Rain falls on about 9 days, adding up to 95 mm.
Buenos Aires month by month
The whole year in Buenos AiresAll destinations: ArgentinaWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)