Buenos Aires weather in May
In May, Buenos Aires has an average high of 17 °C63 °F and an average low of 13 °C55 °F, with about 74 mm2.9 in of precipitation. It is the 8th warmest month of the year and ranks 9th for precipitation.
How May compares with other months
Compared with April, May is 3.6 °C6.5 °F cooler on average and drier by 24 mm0.9 in. Compared with June, May is 3 °C5.4 °F warmer on average and wetter by 20 mm0.8 in. Daylight lasts about 10.3 hours around the middle of the month. Average relative humidity is 80% and the average cloud amount 55%.
Is May a good time to visit Buenos Aires?
May is not among the most comfortable months by our comfort score: it is cool (average high 17 °C63 °F) and it is fairly wet (74 mm2.9 in). The most comfortable months in Buenos Aires are November–January and April.
What to wear in May
For Buenos Aires in May, pack long sleeves, a sweater and a medium jacket.
May in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Buenos Aires | 1763 | 1355 | 742.9 |
| Berazategui | 1864 | 948 | 712.8 |
| Laferrere | 1864 | 846 | 702.8 |
| Merlo | 1865 | 847 | 722.8 |
| La Plata | 1864 | 948 | 712.8 |
| Montevideo | 1762 | 1254 | 843.3 |
| San Nicolás de los Arroyos | 1966 | 846 | 672.6 |
| Rosario | 1966 | 847 | 522.0 |
| Tandil | 1559 | 541 | 552.2 |
Nearby places that are more than 1 °C1.8 °F cooler: Berazategui, Laferrere, Merlo and La Plata.
Other months in Buenos Aires
- 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
Frequently asked questions
How warm is Buenos Aires in May?
In May the average high in Buenos Aires is 17 °C (63 °F) and the average low is 13 °C (55 °F).
Does it rain a lot in Buenos Aires in May?
On average about 74 mm (2.9 in) of precipitation falls in May; it ranks 9th of the 12 months.
Is May the warmest month in Buenos Aires?
No. The warmest month in Buenos Aires is January, with an average high of 28 °C (82 °F). The coldest month is July, with an average low of 9 °C (48 °F).
How long is the day in Buenos Aires in May?
In the middle of May the day in Buenos Aires lasts about 10.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Buenos Aires in May?
The average relative humidity in May is about 80%. This is a long-term average for the whole day.
How cloudy is Buenos Aires in May?
On average about 55% of the sky is covered by cloud in May. This is the mean cloud amount from satellite data, not the number of sunny days.
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.