Climate & Weather in Buenos Aires (2026)

Buenos Aires is in the Southern Hemisphere, so seasons are reversed—summer is December–March, winter is June–August.
Spring (September–November) and fall (March–May) offer the best balance of comfortable weather, fewer crowds, and lower prices.
Summer humidity can feel intense even when temperatures are in the 30s°C; thunderstorms are common in the afternoon.
Winter is mild (not freezing), but cloudy, grey, and humid; frosts occur but are not extreme.
The city experiences variable weather due to wind systems (Pampero, Sudestada, and Zonda) that can bring sudden temperature changes and storms.
No snowfall expected in the city proper; extremely unusual if it occurs.

September to November
Why
Pleasant mild temperatures, lower humidity, fewer crowds, cultural events
Season
Spring
March to May
Why
Mild temperatures around 20–22°C (68–72°F), low hotel occupancy, good rates
Season
Fall/Autumn

January and February
Why
Hottest and most humid months, peak tourist season, crowded, high prices
Season
Summer
June to August
Why
Cold and rainy, fewer outdoor activities, though cheapest prices
Season
Winter

Pattern: Moderate year-round; highest in January and March
Annual Total Mm: 1000
Note: Summer is rainiest season (December–March); winter relatively drier but still receives rain

Occurrence: Extremely rare
Note: Has only occurred three times since 1906 at the central observatory (1918, 1928, 2007)

Humid subtropical

AI-generated estimateData refreshed July 2026

These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.

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Data last updated July 2026 · Verify anything important.