Buenos Aires Weather in October
Argentina · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
October in Buenos Aires sees average temperatures ranging from a low of 13.3°C (55.9°F) to a high of 21.5°C (70.7°F), with a mean of 17.3°C (63.1°F). Compared to the annual average of 17.6°C (63.7°F), this month is 0.3°C cooler than the yearly norm. Precipitation averages 66.2mm, making it approximately 8.0mm drier than the monthly average of 74.0mm. The city receives an average of 10.6 hours of sunshine per day during October, with relative humidity averaging 69.1%. Wind speeds reach an average maximum of 25.0 km/h. For travelers, this month offers a temperature experience in Buenos Aires, with drier-than-average conditions compared to the rest of the year.
If you're planning outdoor activities in Buenos Aires, the seasons are flipped but mild. I ran the Costanera Sur in January (summer): 30°C with 70% humidity, draining but the river breeze helped. March-April is the outdoor sweet spot: 22°C, manageable UV, empty paths. October-November is similarly ideal — jacarandas blooming, 20°C, perfect cycling weather. July (winter) brings 12°C and dampness; running is fine but mornings feel raw. UV peaks dangerously in January (11+); sun protection is mandatory between 10am-4pm. The wind off the Río de la Plata is constant and can be bracing in winter.
October vs Adjacent Months
| Metric | September | October | November |
|---|---|---|---|
| Mean Temp | 14.4°C (57.9°F) | 17.3°C (63.1°F) | 20.9°C (69.6°F) |
| Rainfall | 63.5mm | 66.2mm | 91.6mm |
| Sunshine | 9.0 hrs | 10.6 hrs | 11.5 hrs |
| Humidity | 74.4% | 69.1% | 66.5% |
| Wind | 24.3 km/h | 25.0 km/h | 25.3 km/h |
| Rainy Days | 9.6 | 11.8 | 11.0 |
Seasonal Context
October falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Buenos Aires in October, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Buenos Aires in October?
The average temperature in Buenos Aires during October ranges from 13.3°C (55.9°F) to 21.5°C (70.7°F), with a mean of 17.3°C (63.1°F).
How much does it rain in Buenos Aires in October?
Buenos Aires receives an average of 66.2mm of precipitation in October, spread across approximately 11.8 rainy days.
What should I pack for Buenos Aires in October?
Based on October weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is October a good time to visit Buenos Aires?
October is a good time to visit Buenos Aires, with comfortable temperatures and manageable rainfall.
Other Months for Buenos Aires
Cities with Similar October Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -34.61°, -58.38°. Timezone: America/Argentina/Buenos_Aires. Last updated: 2026-07-30.