Climate averages 1991–2020
Merlo weather
in August.
A mild, moderately wet month: the 10th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Merlo: daytime highs average 16.6°C and nights cool to about 7.4°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 60 mm of rain on roughly 6 days, which makes August a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 50 min on an average August day.
The nearest other city in this atlas is Moreno (7 km away). In August its highs average 16.7°C, about as warm as Merlo, with 60 mm of rain.
Among the 67 cities listed in Argentina, Merlo ranks joint 37th of 67 for the warmest August highs and joint 35th of 67 for the driest August (rainfall, lowest first). The mean August high of those 67 cities is 17.2°C; Merlo is 0.6°C cooler than that mean.
From August to September, average highs rise by 1.8°C to 18.5°C, and monthly rainfall rises from 60 mm to 71 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
Merlo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C19.2°C | 19.2°C | 88 | 7.7 | 14.214 h |
| February | 27.8°C18.4°C | 18.4°C | 94 | 8.3 | 13.413 h |
| March | 25.7°C16.7°C | 16.7°C | 85 | 7.5 | 12.312 h |
| April | 21.8°C13.1°C | 13.1°C | 91 | 8.1 | 11.211 h |
| May | 18.0°C10.0°C | 10.0°C | 62 | 6.2 | 10.310 h |
| June | 15.0°C7.1°C | 7.1°C | 58 | 5.9 | 9.910 h |
| July | 14.2°C6.0°C | 6.0°C | 57 | 6.0 | 10.110 h |
| August, selected | 16.6°C7.4°C | 7.4°C | 60 | 5.8 | 10.811 h |
| September | 18.5°C9.1°C | 9.1°C | 71 | 6.7 | 11.812 h |
| October | 21.3°C11.9°C | 11.9°C | 111 | 9.2 | 12.913 h |
| November | 24.7°C14.6°C | 14.6°C | 92 | 8.4 | 13.914 h |
| December | 27.9°C17.4°C | 17.4°C | 87 | 8.6 | 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
- Moreno in AugustArgentina · 7 kmHigh 16.7°C · Low 7.3°C · 60 mm rain
- Bella Vista in AugustArgentina · 12 kmHigh 16.6°C · Low 7.5°C · 63 mm rain
- Isidro Casanova in AugustArgentina · 13 kmHigh 16.4°C · Low 7.6°C · 62 mm rain
- San Miguel, Argentina in AugustArgentina · 14 kmHigh 16.5°C · Low 7.7°C · 63 mm rain
- Laferrere in AugustArgentina · 16 kmHigh 16.4°C · Low 7.5°C · 62 mm rain
- José C. Paz in AugustArgentina · 17 kmHigh 16.7°C · Low 7.4°C · 63 mm rain
- Don Torcuato in AugustArgentina · 21 kmHigh 16.2°C · Low 8.1°C · 63 mm rain
- Ezeiza in AugustArgentina · 28 kmHigh 16.3°C · Low 7.4°C · 62 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 Merlo) is explained once on the Merlo year overview and on the Sources, method and limits page.
Moreno lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.