Climate in Buenos Aires, Argentina

Buenos Aires, Argentina has a humid subtropical climate. The annual average temperature is about 20°C, with around 1693 hours of sunshine; the national rainfall baseline is roughly 901 mm across 99 rainy days a year. The warmest month is Jan (highs near 30.4°C) and the coldest is Jul (lows near 9.5°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Buenos Aires is classified as Humid Subtropical. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for Argentina — so cities in the same country usually share a zone.

The rainfall baseline for Argentina is about 901 mm a year over roughly 99 rainy days, with the wettest month Jan and the driest Jul. This figure is not specific to Buenos Aires: every city in Argentina carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Buenos Aires sees an estimated 1693 hours of sunshine a year, concentrated in the warmer months around Jan.

By temperature and rainfall, the most comfortable months in Buenos Aires are May, Apr, Oct. Conditions vary year to year — verify with a current forecast before booking.

Buenos Aires has a climate comfort score of 85/100, a very comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in São Paulo — Temperate, comfort 83/100
• Climate in Santiago — Semi-Arid, comfort 90/100
• Climate in Mexico City — Semi-Arid, comfort 72/100