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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 84°F, while the coldest is July averaging around 47°F at night. Around 42 inches of precipitation falls each year, peaking in October (4.9 inches) and easing off in June (2.1 inches).
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 (°F) | 84 | 82 | 79 | 73 | 66 | 61 | 59 | 63 | 66 | 71 | 77 | 83 |
| Avg temp (°F) | 77 | 75 | 72 | 66 | 60 | 55 | 53 | 56 | 59 | 64 | 70 | 74 |
| Avg low (°F) | 69 | 68 | 66 | 59 | 54 | 48 | 47 | 49 | 52 | 57 | 62 | 66 |
| Precipitation (in) | 4.1 | 4.4 | 4.1 | 4.2 | 3.3 | 2.1 | 2.4 | 2.5 | 2.7 | 4.9 | 3.7 | 3.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 82 | 79 | 73 | 66 | 61 |
| Avg temp (°F) | 77 | 75 | 72 | 66 | 60 | 55 |
| Avg low (°F) | 69 | 68 | 66 | 59 | 54 | 48 |
| Precipitation (in) | 4.1 | 4.4 | 4.1 | 4.2 | 3.3 | 2.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 59 | 63 | 66 | 71 | 77 | 83 |
| Avg temp (°F) | 53 | 56 | 59 | 64 | 70 | 74 |
| Avg low (°F) | 47 | 49 | 52 | 57 | 62 | 66 |
| Precipitation (in) | 2.4 | 2.5 | 2.7 | 4.9 | 3.7 | 3.7 |
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 (mph) | 10.2 | 10.1 | 10.1 | 10.4 | 10.1 | 10.4 | 10.5 | 10.2 | 10.8 | 10.8 | 10.9 | 10.3 |
| 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 (mph) | 10.2 | 10.1 | 10.1 | 10.4 | 10.1 | 10.4 |
| 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 (mph) | 10.5 | 10.2 | 10.8 | 10.8 | 10.9 | 10.3 |
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.