Climate averages 1991–2020
San Martín weather
in August.
A mild, very dry 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 San Martín: daytime highs average 17.7°C and nights cool to about 5.3°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 10 mm of rain on roughly 2 days, which makes August a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 54 min on an average August day.
The nearest other city in this atlas is Mendoza (41 km away). In August its highs average 15.1°C, 2.6°C cooler than San Martín, with 25 mm of rain.
Among the 67 cities listed in Argentina, San Martín ranks 28th of 67 for the warmest August highs and joint 2nd of 67 for the driest August (rainfall, lowest first). The mean August high of those 67 cities is 17.2°C; San Martín is 0.5°C warmer than that mean.
From August to September, average highs rise by 3.4°C to 21.1°C, and monthly rainfall rises from 10 mm to 11 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
San Martín climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.3°C20.0°C | 20.0°C | 48 | 7.7 | 14.114 h |
| February | 29.7°C18.6°C | 18.6°C | 38 | 6.4 | 13.313 h |
| March | 26.7°C16.3°C | 16.3°C | 43 | 6.2 | 12.312 h |
| April | 22.0°C11.9°C | 11.9°C | 20 | 4.3 | 11.311 h |
| May | 17.8°C8.1°C | 8.1°C | 12 | 2.6 | 10.410 h |
| June | 14.9°C4.4°C | 4.4°C | 5.5 | 1.3 | 10.010 h |
| July | 14.5°C3.2°C | 3.2°C | 5.6 | 1.6 | 10.210 h |
| August, selected | 17.7°C5.3°C | 5.3°C | 10 | 1.9 | 10.911 h |
| September | 21.1°C8.5°C | 8.5°C | 11 | 2.3 | 11.912 h |
| October | 24.9°C12.5°C | 12.5°C | 20 | 3.9 | 12.913 h |
| November | 28.4°C16.0°C | 16.0°C | 27 | 5.1 | 13.814 h |
| December | 30.9°C18.8°C | 18.8°C | 39 | 6.7 | 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
- Mendoza in AugustArgentina · 41 kmHigh 15.1°C · Low 3.2°C · 25 mm rain
- Rawson in AugustArgentina · 167 kmHigh 19.1°C · Low 4.3°C · 10 mm rain
- San Rafael in AugustArgentina · 171 kmHigh 16.5°C · Low 3.2°C · 22 mm rain
- San Juan, Argentina in AugustArgentina · 172 kmHigh 19.4°C · Low 5.0°C · 10 mm rain
- Peñalolén in AugustChile · 196 kmHigh 14.2°C · Low 3.0°C · 90 mm rain
- San Luis in AugustArgentina · 201 kmHigh 18.9°C · Low 7.0°C · 15 mm rain
- Puente Alto in AugustChile · 204 kmHigh 14.9°C · Low 1.7°C · 90 mm rain
- Colina in AugustChile · 205 kmHigh 16.9°C · Low 5.9°C · 99 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 San Martín) is explained once on the San Martín year overview and on the Sources, method and limits page.