01Weather
Buenos Aires weather in May
Afternoons in May average 18.7 °C (66 °F) and nights cool to 11.8 °C (53 °F). The month brings about 106 mm (4.2 in) of rain spread over roughly 8 days. Compared with April it is 4.2 °C cooler; June is 2.4 °C cooler again.
What the averages hide
| In a typical May | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 23 °C / 73 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 15 °C / 59 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 8 °C / 46 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 0.0 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Chance of rain on any given day | 27 % | at least 1 mm |
| Hottest / coldest May day 2016–2025 | 27.3 °C / 3.9 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 May | 07:29 | 18:11 | 10.7 h |
| 15 May | 07:40 | 17:59 | 10.3 h |
| 31 May | 07:51 | 17:51 | 10.0 h |
Daylight shrinks by about 42 minutes over the month. Times are local (America/Argentina/Buenos_Aires).
03Crowds
How busy Buenos Aires is in May
moderate The main sights are moderate in May. What drives it:
- Book Fair
- May Revolution Day on 25 May
- mild autumn
04Public holidays
Public holidays in May 2027
| Date | Holiday |
|---|---|
| 1 May 2027 | Labour Day |
| 25 May 2027 | May Revolution |
On public holidays many shops close and museums run on Sunday hours; check opening times for the day before and after as well.
05Events
What's on in Buenos Aires in May
Every year in May
| Event | When | Type |
|---|---|---|
| Revolución de Mayo | 25 May, Plaza de Mayo | national |
07Packing
What to pack for Buenos Aires in May
- layers: t-shirt plus a light jacket for evenings
- comfortable walking shoes
- a compact umbrella for occasional showers
08Editor's notes
What the numbers don't tell you
May brings cool autumn days around 18 °C, the Book Fair running until mid-month and the May Revolution anniversary on 25 May with celebrations at Plaza de Mayo and locro stew in the restaurants. Labour Day on 1 May is a holiday. Rain is more frequent, on about seven days. It is a good-value month with the cultural season in full swing and the tango festival in August still to come.
The Colón's opera season is at its best. The Night of the Museums falls in November; May brings the Arte BA fair at La Rural. Daylight runs from about half past seven to six. The first cold fronts arrive at the end of the month. For the beginning of winter and Flag Day, see June.
09Compare
Buenos Aires month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 30 °C | 21 °C | 10 | – | moderate | Excellent |
| February | 29 °C | 21 °C | 10 | – | moderate | Excellent |
| March | 26 °C | 19 °C | 9 | – | busy | Good |
| April | 23 °C | 16 °C | 10 | – | busy | Good |
| May | 19 °C | 12 °C | 8 | – | moderate | Excellent |
| June | 16 °C | 9 °C | 6 | – | quiet | Good |
| July | 15 °C | 8 °C | 8 | – | moderate | Good |
| August | 17 °C | 10 °C | 8 | – | quiet | Excellent |
| September | 19 °C | 12 °C | 8 | – | moderate | Excellent |
| October | 22 °C | 14 °C | 10 | – | busy | Good |
| November | 26 °C | 17 °C | 9 | – | busy | Excellent |
| December | 28 °C | 19 °C | 9 | – | busy | Good |
Not sure about May? See the best time to visit Buenos Aires.
10Elsewhere
May in nearby cities
| City | High | Rain days |
|---|---|---|
| Rio de Janeiro in May | 28 °C | – |
| Cancún in May | 31 °C | – |
| Miami in May | 31 °C | 9 |
| Orlando in May | 32 °C | 4 |
| New York City in May | 22 °C | 9 |
| Toronto in May | 19 °C | 8 |
11FAQ
Buenos Aires in May: your questions
Is May a good time to visit Buenos Aires?
May is one of the best months to visit Buenos Aires. Daytime highs average 19 °C (66 °F), rain falls on about 8 days, and hotel arrivals run above the yearly average, so the main sights are moderate.
What is the weather like in Buenos Aires in May?
Expect mild days around 19 °C (66 °F) and nights near 12 °C (53 °F). One May in ten brings afternoons above 23 °C, and one in ten stays below 15 °C.
Does it rain a lot in Buenos Aires in May?
May brings about 106 mm (4.2 in) of rain over roughly 8 days, which is fairly dry by Buenos Aires standards. On any given day the chance of at least 1 mm of rain is 27 percent.
What should I wear in Buenos Aires in May?
Pack layers: t-shirt plus a light jacket for evenings, comfortable walking shoes, a compact umbrella for occasional showers.
Is Buenos Aires crowded in May?
The main sights are moderate in May. Main drivers: Book Fair; May Revolution Day on 25 May; mild autumn.
What time does it get dark in Buenos Aires in May?
Around the middle of May the sun sets at about 17:59 and rises at 07:40, giving 10.3 hours of daylight.