Weather in Buenos Aires

Weather — Buenos Aires

Buenos Aires has a mild temperate climate with a clear southern‑hemisphere rhythm: hot, humid summers (December–February), cool winters (June–July) and pleasant shoulder seasons in autumn and spring. Summers bring high temperatures near 28–29 °C, strong sun and frequent showers, while winters are milder than many northern cities, with daytime highs around 15–18 °C but cooler nights. For travellers hunting flight deals or planning beach time, December–March is warmest and best for swimming; June–August is low season for beach activities but good for city sightseeing with fewer crowds.

Weather in Buenos Aires — January

January is one of the hottest months: average highs around 29 °C and lows near 19 °C. Expect plenty of sunshine (about 9 hours of sun), high UV (index ~11) and intermittent rain—roughly 8–11 rainy days—so pack light summer clothes and a quick-dry jacket. Great month for nightlife, beaches and late sunsets; book flights early if you target holiday weeks.

Weather in Buenos Aires — February

February stays warm with highs near 28 °C and lows around 19 °C; humidity remains noticeable and thunderstorms are common. Sea temperatures sit around 24 °C, making swimming very comfortable. It’s still high season for tourists and flights can be pricier, but weather rewards with long daylight and lively outdoor culture.

Weather in Buenos Aires — March

March begins the autumn transition: daytime highs about 26 °C and nights around 17 °C. Rainfall is still relatively high and sunshine drops to roughly 7 hours a day, but humidity eases compared with peak summer. It’s a pleasant month for city walks and cultural events with warm days and milder evenings.

Weather in Buenos Aires — April

April cools further—average highs near 22 °C and lows about 13 °C—bringing crisp mornings and comfortable afternoons. Rain days decline slightly and daylight shortens; ideal for exploring parks and neighbourhoods without the summer heat. A smart shoulder‑season choice for travellers seeking good weather and more attractive flight prices.

Weather in Buenos Aires — May

May is noticeably cooler with highs around 18 °C and lows near 10 °C. Days are generally dry and pleasant, although overcast periods increase towards the end of autumn. This month suits cultural sightseeing and city breaks—layered clothing is recommended for cooler mornings and evenings.

Weather in Buenos Aires — June

June is one of the coldest months: average highs about 15 °C and nights near 7–8 °C. Sea temperatures fall to the low teens (≈14 °C), so it’s not prime for swimming, but the city is quieter and good value for flights and accommodation. Bring a warm jacket for cool evenings.

Weather in Buenos Aires — July

July remains cool with highs around 15–16 °C and lows near 6–7 °C. Rainfall is moderate and daylight hours are at their shortest, but the mild winter makes Buenos Aires still very walkable compared with harsher climates. A good time for budget-conscious travellers and cultural tourism.

Weather in Buenos Aires — August

August starts the slow climb toward spring: daytime temperatures average about 17–18 °C with cool nights. Sunshine increases and rain stays moderate, so outdoor sightseeing becomes more enjoyable. Expect occasional windy days but generally improving conditions.

Weather in Buenos Aires — September

September brings mild spring weather—highs near 18–19 °C and lows around 10 °C—with more daylight and comfortable temperatures for walking tours. Sea temperatures begin to rise, but are still cool for swimming. It’s a charming month for visiting gardens and cultural festivals.

Weather in Buenos Aires — October

October warms noticeably with average highs ~21–22 °C and lows near 13 °C. Rainfall increases again and there can be showery periods, but long sunny spells are common. A pleasant shoulder month combining spring blossoms with increasingly warm afternoons—good for flexible travel plans and finding deals on flights.

Weather in Buenos Aires — November

November is warm and inviting: highs around 25 °C and lows about 15 °C, with sea temperatures near 20 °C. Sunshine increases and outdoor dining comes into full swing. It’s a popular time to travel—consider booking flights early for the best prices.

Weather in Buenos Aires — December

December signals summer arrival with average highs near 28 °C and lows around 17–18 °C. Sea temperature is pleasant (~23 °C), UV is high, and there are plenty of sunny days mixed with intermittent showers. Perfect for beach outings, open‑air events and peak holiday travel.

Table of average min/max temperatures during the year