Climate averages 1991–2020
Buenos Aires weather
in May.
A mild, moderately wet month: the 9th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Buenos Aires: daytime highs average 17.2°C and nights cool to about 11.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 72 mm of rain on roughly 7 days, which makes May a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 20 min on an average May day.
The nearest other city in this atlas is Avellaneda (5 km away). In May its highs average 17.3°C, about as warm as Buenos Aires, with 63 mm of rain.
Among the 67 cities listed in Argentina, Buenos Aires ranks 48th of 67 for the warmest May highs and joint 55th of 67 for the driest May (rainfall, lowest first). The mean May high of those 67 cities is 18.0°C; Buenos Aires is 0.8°C cooler than that mean.
From May to June, average highs fall by 2.9°C to 14.3°C, and monthly rainfall rises from 72 mm to 74 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Buenos Aires climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.6°C20.3°C | 20.3°C | 83 | 6.9 | 14.214 h |
| February | 26.4°C19.7°C | 19.7°C | 99 | 8.1 | 13.413 h |
| March | 24.5°C18.1°C | 18.1°C | 96 | 7.6 | 12.312 h |
| April | 20.9°C14.6°C | 14.6°C | 102 | 8.1 | 11.211 h |
| May, selected | 17.2°C11.5°C | 11.5°C | 72 | 6.8 | 10.310 h |
| June | 14.3°C8.6°C | 8.6°C | 74 | 7.7 | 9.910 h |
| July | 13.3°C7.5°C | 7.5°C | 74 | 7.1 | 10.110 h |
| August | 15.5°C8.8°C | 8.8°C | 71 | 6.6 | 10.811 h |
| September | 17.3°C10.4°C | 10.4°C | 80 | 7.1 | 11.812 h |
| October | 20.2°C13.3°C | 13.3°C | 119 | 9.8 | 12.913 h |
| November | 23.4°C15.9°C | 15.9°C | 95 | 8.2 | 13.914 h |
| December | 26.3°C18.6°C | 18.6°C | 87 | 8.1 | 14.414 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Avellaneda in MayArgentina · 5 kmHigh 17.3°C · Low 11.2°C · 63 mm rain
- Lomas de Zamora in MayArgentina · 16 kmHigh 17.5°C · Low 10.6°C · 61 mm rain
- Quilmes in MayArgentina · 16 kmHigh 17.3°C · Low 11.0°C · 63 mm rain
- Isidro Casanova in MayArgentina · 22 kmHigh 17.8°C · Low 10.2°C · 61 mm rain
- Berazategui in MayArgentina · 23 kmHigh 17.1°C · Low 11.4°C · 63 mm rain
- Laferrere in MayArgentina · 24 kmHigh 17.8°C · Low 10.1°C · 61 mm rain
- Don Torcuato in MayArgentina · 26 kmHigh 17.7°C · Low 10.8°C · 65 mm rain
- Bella Vista in MayArgentina · 29 kmHigh 17.9°C · Low 10.2°C · 65 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Buenos Aires) is explained once on the Buenos Aires year overview and on the Sources, method and limits page.