Climate averages 1991–2020
Buenos Aires weather
in August.
A mild, moderately wet month: the 10th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Buenos Aires: daytime highs average 15.5°C and nights cool to about 8.8°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 71 mm of rain on roughly 7 days, which makes August a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 50 min on an average August day.
The nearest other city in this atlas is Avellaneda (5 km away). In August its highs average 15.7°C, about as warm as Buenos Aires, with 66 mm of rain.
Among the 67 cities listed in Argentina, Buenos Aires ranks 50th of 67 for the warmest August highs and 60th of 67 for the driest August (rainfall, lowest first). The mean August high of those 67 cities is 17.2°C; Buenos Aires is 1.7°C cooler than that mean.
From August to September, average highs rise by 1.8°C to 17.3°C, and monthly rainfall rises from 71 mm to 80 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Avellaneda in AugustArgentina · 5 kmHigh 15.7°C · Low 8.5°C · 66 mm rain
- Lomas de Zamora in AugustArgentina · 16 kmHigh 15.9°C · Low 8.0°C · 62 mm rain
- Quilmes in AugustArgentina · 16 kmHigh 15.7°C · Low 8.3°C · 66 mm rain
- Isidro Casanova in AugustArgentina · 22 kmHigh 16.4°C · Low 7.6°C · 62 mm rain
- Berazategui in AugustArgentina · 23 kmHigh 15.4°C · Low 8.7°C · 66 mm rain
- Laferrere in AugustArgentina · 24 kmHigh 16.4°C · Low 7.5°C · 62 mm rain
- Don Torcuato in AugustArgentina · 26 kmHigh 16.2°C · Low 8.1°C · 63 mm rain
- Bella Vista in AugustArgentina · 29 kmHigh 16.6°C · Low 7.5°C · 63 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.