Climate averages 1991–2020
San Martín weather
in October.
A warm, fairly dry month: the 6th warmest and the joint 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in San Martín: daytime highs average 24.9°C and nights cool to about 12.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 20 mm of rain on roughly 4 days, which makes October a fairly dry month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 53 min on an average October day.
The nearest other city in this atlas is Mendoza (41 km away). In October its highs average 21.9°C, 3.1°C cooler than San Martín, with 43 mm of rain.
Among the 67 cities listed in Argentina, San Martín ranks 13th of 67 for the warmest October highs and 3rd of 67 for the driest October (rainfall, lowest first). The mean October high of those 67 cities is 22.2°C; San Martín is 2.7°C warmer than that mean.
From October to November, average highs rise by 3.5°C to 28.4°C, and monthly rainfall rises from 20 mm to 27 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Mendoza in OctoberArgentina · 41 kmHigh 21.9°C · Low 9.9°C · 43 mm rain
- Rawson in OctoberArgentina · 167 kmHigh 24.7°C · Low 11.2°C · 21 mm rain
- San Rafael in OctoberArgentina · 171 kmHigh 22.7°C · Low 10.0°C · 60 mm rain
- San Juan, Argentina in OctoberArgentina · 172 kmHigh 25.1°C · Low 11.8°C · 21 mm rain
- Peñalolén in OctoberChile · 196 kmHigh 18.9°C · Low 7.4°C · 62 mm rain
- San Luis in OctoberArgentina · 201 kmHigh 23.9°C · Low 12.5°C · 66 mm rain
- Puente Alto in OctoberChile · 204 kmHigh 19.7°C · Low 6.4°C · 62 mm rain
- Colina in OctoberChile · 205 kmHigh 21.4°C · Low 10.4°C · 59 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.