Buenos Aires climate
Buenos Aires (Argentina) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 18 °C64 °F, and about 1,103 mm43 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Buenos Aires climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2882 | 2271 | 2576 | 1044.1 |
| Feb | 2780 | 2170 | 2475 | 1214.8 |
| Mar | 2576 | 1967 | 2271 | 1234.8 |
| Apr | 2170 | 1661 | 1966 | 983.8 |
| May | 1763 | 1355 | 1559 | 742.9 |
| Jun | 1458 | 1050 | 1254 | 542.1 |
| Jul | 1356 | 948 | 1152 | 722.8 |
| Aug | 1559 | 1050 | 1254 | 712.8 |
| Sep | 1762 | 1253 | 1458 | 833.3 |
| Oct | 2068 | 1458 | 1763 | 1104.3 |
| Nov | 2374 | 1763 | 2069 | 1004.0 |
| Dec | 2679 | 2068 | 2373 | 943.7 |
| Year | 2882 | 948 | 1864 | 1,10343 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 68% | 45% | 7.2 | 14:14 |
| Feb | 72% | 46% | 6.3 | 13:23 |
| Mar | 74% | 43% | 5.2 | 12:24 |
| Apr | 75% | 47% | 3.9 | 11:16 |
| May | 80% | 55% | 2.7 | 10:20 |
| Jun | 81% | 57% | 2.3 | 9:51 |
| Jul | 81% | 58% | 2.4 | 10:03 |
| Aug | 80% | 54% | 3.3 | 10:50 |
| Sep | 78% | 53% | 4.4 | 11:56 |
| Oct | 76% | 53% | 5.5 | 13:02 |
| Nov | 71% | 46% | 6.8 | 13:00 |
| Dec | 68% | 43% | 7.5 | 14:28 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Buenos Aires is like
The warmest month is January, with an average high of 28 °C82 °F and a low of 22 °C71 °F. The coldest is July, when highs average 13 °C56 °F and lows 9 °C48 °F. There is a clear seasonal cycle, with 13.7 °C24.7 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,103 mm43 in of precipitation per year. The wettest three-month stretch is January–March, which brings 32% of the annual total. The wettest month is March (123 mm4.8 in), the driest is June (54 mm2.1 in).
Relative humidity ranges from 68% in December to 81% in July. The clearest skies (lowest average cloud amount, 43%) are typical of March. Average wind speed near the ground ranges from 16 km/h (10 mph) in May to 18 km/h (11 mph) in November. Daylight lasts from about 9.8 hours in June to 14.5 hours in December.
Best time to visit Buenos Aires
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–January and April: average highs of 21 °C70 °F to 28 °C82 °F with 94 mm3.7 in to 104 mm4.1 in of precipitation per month.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
Buenos Aires weather by month
- January28 °C82 °F / 22 °C71 °F
- February27 °C80 °F / 21 °C70 °F
- March25 °C76 °F / 19 °C67 °F
- April21 °C70 °F / 16 °C61 °F
- May17 °C63 °F / 13 °C55 °F
- June14 °C58 °F / 10 °C50 °F
- July13 °C56 °F / 9 °C48 °F
- August15 °C59 °F / 10 °C50 °F
- September17 °C62 °F / 12 °C53 °F
- October20 °C68 °F / 14 °C58 °F
- November23 °C74 °F / 17 °C63 °F
- December26 °C79 °F / 20 °C68 °F
What to pack for Buenos Aires
- Summer (December–February) — highs 2679 to 28 °C82 °F, lows 2068 to 22 °C71 °F, about 107 mm4.2 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Autumn (March–May) — highs 1763 to 25 °C76 °F, lows 1355 to 19 °C67 °F, about 98 mm3.9 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
- Winter (June–August) — highs 1356 to 15 °C59 °F, lows 948 to 10 °C50 °F, about 65 mm2.6 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Spring (September–November) — highs 1762 to 23 °C74 °F, lows 1253 to 17 °C63 °F, about 98 mm3.8 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Buenos Aires compares
Of the 31 places in Argentina covered by World Climates, Buenos Aires is the 16th warmest by annual mean temperature and the 10th wettest by annual precipitation. See all of them on the Argentina climate page.
Places in other countries with the most similar temperature and rainfall pattern: Liverpool (Australia, Cfa), Wollongong (Australia, Cfa) and Richmond (New South Wales) (Australia, Cfa).
The same NASA POWER grid cell also contains Avellaneda (pop. 367,554), Quilmes (pop. 262,379) and Lanús (pop. 212,252). Their long-term averages in this dataset are essentially the same as for Buenos Aires, so they do not have separate pages.
Nearby places
- Berazategui 23 km · 17 °C62 °F · 1,072 mm42 in
- Laferrere 24 km · 16 °C62 °F · 1,069 mm42 in
- Merlo 33 km · 17 °C62 °F · 1,108 mm44 in
- La Plata 52 km · 17 °C62 °F · 1,072 mm42 in
- Montevideo 203 km · 17 °C62 °F · 1,183 mm47 in
- San Nicolás de los Arroyos 221 km · 17 °C63 °F · 1,178 mm46 in
- Rosario 279 km · 18 °C64 °F · 1,091 mm43 in
- Tandil 310 km · 14 °C57 °F · 907 mm36 in
Frequently asked questions
What is the warmest month in Buenos Aires?
January is the warmest month in Buenos Aires, with an average high of 28 °C (82 °F) and an average low of 22 °C (71 °F).
What is the coldest month in Buenos Aires?
July is the coldest month, with an average high of 13 °C (56 °F) and an average low of 9 °C (48 °F).
When does it rain the most in Buenos Aires?
March is the wettest month with about 123 mm (4.8 in) of precipitation; June is the driest with about 54 mm (2.1 in).
What is the best time to visit Buenos Aires?
Judging by long-term averages, the most comfortable months are November–January and April.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.