Climate averages 1991–2020
Santiago weather
in August.
A mild, moderately wet month: the 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Santiago: daytime highs average 15.4°C and nights cool to about 3.0°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 81 mm of rain on roughly 8 days, which makes August a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 53 min on an average August day.
The nearest other city in this atlas is Peñalolén (11 km away). In August its highs average 14.2°C, 1.2°C cooler than Santiago, with 90 mm of rain.
Among the 40 cities listed in Chile, Santiago ranks 20th of 40 for the warmest August highs and joint 17th of 40 for the driest August (rainfall, lowest first). The mean August high of those 40 cities is 15.5°C; Santiago is 0.1°C cooler than that mean.
From August to September, average highs rise by 2.2°C to 17.6°C, and monthly rainfall falls from 81 mm to 55 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
Santiago climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.0°C16.6°C | 16.6°C | 2.7 | 0.7 | 14.114 h |
| February | 27.5°C16.2°C | 16.2°C | 4.5 | 0.9 | 13.313 h |
| March | 26.1°C14.7°C | 14.7°C | 8.6 | 1.2 | 12.312 h |
| April | 22.2°C10.1°C | 10.1°C | 28 | 3.3 | 11.311 h |
| May | 18.4°C6.1°C | 6.1°C | 62 | 6.0 | 10.410 h |
| June | 14.7°C2.8°C | 2.8°C | 109 | 7.3 | 10.010 h |
| July | 13.8°C1.9°C | 1.9°C | 86 | 7.1 | 10.210 h |
| August, selected | 15.4°C3.0°C | 3.0°C | 81 | 7.7 | 10.911 h |
| September | 17.6°C5.0°C | 5.0°C | 55 | 7.8 | 11.912 h |
| October | 20.1°C7.5°C | 7.5°C | 39 | 6.1 | 12.913 h |
| November | 23.4°C10.6°C | 10.6°C | 16 | 2.6 | 13.814 h |
| December | 26.2°C14.1°C | 14.1°C | 6.3 | 1.0 | 14.314 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
- Peñalolén in AugustChile · 11 kmHigh 14.2°C · Low 3.0°C · 90 mm rain
- Quilicura in AugustChile · 12 kmHigh 16.1°C · Low 4.5°C · 99 mm rain
- Maipú in AugustChile · 13 kmHigh 16.5°C · Low 3.9°C · 81 mm rain
- San Bernardo in AugustChile · 16 kmHigh 16.3°C · Low 2.7°C · 81 mm rain
- Puente Alto in AugustChile · 18 kmHigh 14.9°C · Low 1.7°C · 90 mm rain
- Peñaflor in AugustChile · 27 kmHigh 17.0°C · Low 4.1°C · 71 mm rain
- Colina in AugustChile · 28 kmHigh 16.9°C · Low 5.9°C · 99 mm rain
- Lampa in AugustChile · 28 kmHigh 17.6°C · Low 6.2°C · 71 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 Santiago) is explained once on the Santiago year overview and on the Sources, method and limits page.
Maipú and San Bernardo lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.