Buenos Aires Weather in May
Argentina · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Buenos Aires sees average temperatures ranging from a low of 10.1°C (50.2°F) to a high of 17.0°C (62.6°F), with a mean of 13.4°C (56.1°F). Compared to the annual average of 17.6°C (63.7°F), this month is 4.2°C cooler than the yearly norm. Precipitation averages 47.6mm, making it approximately 27.0mm drier than the monthly average of 74.0mm. The city receives an average of 8.1 hours of sunshine per day during May, with relative humidity averaging 77.4%. Wind speeds reach an average maximum of 21.5 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.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 18.0°C (64.4°F) | 13.4°C (56.1°F) | 11.5°C (52.7°F) |
| Rainfall | 98.9mm | 47.6mm | 35.7mm |
| Sunshine | 8.8 hrs | 8.1 hrs | 7.5 hrs |
| Humidity | 76.9% | 77.4% | 80.0% |
| Wind | 22.4 km/h | 21.5 km/h | 20.7 km/h |
| Rainy Days | 10.8 | 6.4 | 10.8 |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Buenos Aires in May, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Buenos Aires in May?
The average temperature in Buenos Aires during May ranges from 10.1°C (50.2°F) to 17.0°C (62.6°F), with a mean of 13.4°C (56.1°F).
How much does it rain in Buenos Aires in May?
Buenos Aires receives an average of 47.6mm of precipitation in May, spread across approximately 6.4 rainy days.
What should I pack for Buenos Aires in May?
Based on May weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is May a good time to visit Buenos Aires?
May is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Buenos Aires
Cities with Similar May 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.