Home › Cities › Argentina › Buenos Aires
Buenos Aires, Argentina climate
Cfa Humid subtropical
Buenos Aires has a mildly seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is January with an average daily high near 29°C, while the coldest is July averaging around 8°C at night. Around 1065 mm of precipitation falls each year, peaking in October (123 mm) and easing off in June (53 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Buenos Aires climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 28 | 26 | 23 | 19 | 16 | 15 | 17 | 19 | 22 | 25 | 28 |
| Avg temp (°C) | 25 | 24 | 22 | 19 | 16 | 13 | 12 | 13 | 15 | 18 | 21 | 24 |
| Avg low (°C) | 21 | 20 | 19 | 15 | 12 | 9 | 8 | 9 | 11 | 14 | 17 | 19 |
| Precipitation (mm) | 105 | 111 | 103 | 106 | 83 | 53 | 61 | 63 | 68 | 123 | 94 | 95 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 28 | 26 | 23 | 19 | 16 |
| Avg temp (°C) | 25 | 24 | 22 | 19 | 16 | 13 |
| Avg low (°C) | 21 | 20 | 19 | 15 | 12 | 9 |
| Precipitation (mm) | 105 | 111 | 103 | 106 | 83 | 53 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 17 | 19 | 22 | 25 | 28 |
| Avg temp (°C) | 12 | 13 | 15 | 18 | 21 | 24 |
| Avg low (°C) | 8 | 9 | 11 | 14 | 17 | 19 |
| Precipitation (mm) | 61 | 63 | 68 | 123 | 94 | 95 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 47 | 47 | 46 | 51 | 56 | 58 | 59 | 54 | 55 | 55 | 50 | 46 |
| Relative humidity (%) | 69 | 71 | 74 | 76 | 80 | 81 | 82 | 80 | 78 | 76 | 72 | 69 |
| Wind speed (m/s) | 4.5 | 4.5 | 4.5 | 4.6 | 4.5 | 4.6 | 4.7 | 4.6 | 4.8 | 4.8 | 4.9 | 4.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 47 | 47 | 46 | 51 | 56 | 58 |
| Relative humidity (%) | 69 | 71 | 74 | 76 | 80 | 81 |
| Wind speed (m/s) | 4.5 | 4.5 | 4.5 | 4.6 | 4.5 | 4.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 54 | 55 | 55 | 50 | 46 |
| Relative humidity (%) | 82 | 80 | 78 | 76 | 72 | 69 |
| Wind speed (m/s) | 4.7 | 4.6 | 4.8 | 4.8 | 4.9 | 4.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Aeroparque Jorge Newbery, a weather station, about 7 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.