Climate averages 1991–2020
San Luis weather
in October.
A warm, moderately wet month: the 6th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in San Luis: daytime highs average 23.9°C and nights cool to about 12.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 66 mm of rain on roughly 9 days, which makes October a moderately wet month (the 7th 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 Villa Mercedes, Argentina (91 km away). In October its highs average 23.3°C, 0.6°C cooler than San Luis, with 82 mm of rain.
Among the 67 cities listed in Argentina, San Luis ranks 17th of 67 for the warmest October highs and joint 15th of 67 for the driest October (rainfall, lowest first). The mean October high of those 67 cities is 22.2°C; San Luis is 1.7°C warmer than that mean.
From October to November, average highs rise by 2.7°C to 26.6°C, and monthly rainfall rises from 66 mm to 89 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 Luis climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.7°C19.2°C | 19.2°C | 107 | 13.2 | 14.114 h |
| February | 28.2°C18.1°C | 18.1°C | 82 | 10.9 | 13.313 h |
| March | 26.0°C16.4°C | 16.4°C | 80 | 10.0 | 12.312 h |
| April | 21.8°C12.5°C | 12.5°C | 53 | 7.0 | 11.311 h |
| May | 18.6°C9.1°C | 9.1°C | 25 | 4.2 | 10.410 h |
| June | 16.4°C6.2°C | 6.2°C | 8.3 | 1.9 | 10.010 h |
| July | 15.9°C5.0°C | 5.0°C | 9.1 | 2.1 | 10.210 h |
| August | 18.9°C7.0°C | 7.0°C | 15 | 2.6 | 10.911 h |
| September | 21.3°C9.4°C | 9.4°C | 30 | 4.6 | 11.912 h |
| October, selected | 23.9°C12.5°C | 12.5°C | 66 | 8.7 | 12.913 h |
| November | 26.6°C15.5°C | 15.5°C | 89 | 11.7 | 13.814 h |
| December | 28.9°C18.0°C | 18.0°C | 101 | 13.1 | 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
- Villa Mercedes, Argentina in OctoberArgentina · 91 kmHigh 23.3°C · Low 12.0°C · 82 mm rain
- Río Cuarto in OctoberArgentina · 184 kmHigh 23.0°C · Low 12.5°C · 84 mm rain
- San Martín in OctoberArgentina · 201 kmHigh 24.9°C · Low 12.5°C · 20 mm rain
- San Rafael in OctoberArgentina · 237 kmHigh 22.7°C · Low 10.0°C · 60 mm rain
- Mendoza in OctoberArgentina · 239 kmHigh 21.9°C · Low 9.9°C · 43 mm rain
- Rawson in OctoberArgentina · 282 kmHigh 24.7°C · Low 11.2°C · 21 mm rain
- San Juan, Argentina in OctoberArgentina · 284 kmHigh 25.1°C · Low 11.8°C · 21 mm rain
- Córdoba in OctoberArgentina · 290 kmHigh 23.8°C · Low 12.6°C · 85 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 Luis) is explained once on the San Luis year overview and on the Sources, method and limits page.