Best time to visit Buenos Aires: March–May & September–November.
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March–May & September–November is the best window to visit Buenos Aires. Mild autumn or spring temperatures (seasons are reversed south of the equator).
December–February is the stretch to avoid if possible. Hot, humid summer weather that coincides with many locals taking their own holidays.
Not necessarily — weather and crowd timing don't always match the cheapest airfare windows. Check our Best Time to Book Flights tool separately for pricing.
Usually yes — the weeks just before or after Buenos Aires's best window often have nearly as good weather with noticeably fewer crowds and lower prices.