Climate averages 1991–2020
San Luis weather
in July.
A mild, very dry month: the coolest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in San Luis: daytime highs average 15.9°C and nights cool to about 5.0°C. By daytime temperature it is the coolest month of the year.
Expect about 9.1 mm of rain on roughly 2 days, which makes July a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 10 min on an average July day.
The nearest other city in this atlas is Villa Mercedes, Argentina (91 km away). In July its highs average 15.4°C, about as warm as San Luis, with 11 mm of rain.
Among the 67 cities listed in Argentina, San Luis ranks joint 18th of 67 for the warmest July highs and 4th of 67 for the driest July (rainfall, lowest first). The mean July high of those 67 cities is 14.6°C; San Luis is 1.3°C warmer than that mean.
From July to August, average highs rise by 3.0°C to 18.9°C, and monthly rainfall rises from 9.1 mm to 15 mm.
The annual picture
July 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, selected | 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 | 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
July in nearby cities
- Villa Mercedes, Argentina in JulyArgentina · 91 kmHigh 15.4°C · Low 4.5°C · 11 mm rain
- Río Cuarto in JulyArgentina · 184 kmHigh 14.8°C · Low 4.9°C · 11 mm rain
- San Martín in JulyArgentina · 201 kmHigh 14.5°C · Low 3.2°C · 5.6 mm rain
- San Rafael in JulyArgentina · 237 kmHigh 13.8°C · Low 1.5°C · 16 mm rain
- Mendoza in JulyArgentina · 239 kmHigh 12.3°C · Low 1.5°C · 19 mm rain
- Rawson in JulyArgentina · 282 kmHigh 16.2°C · Low 2.3°C · 8.2 mm rain
- San Juan, Argentina in JulyArgentina · 284 kmHigh 16.4°C · Low 2.9°C · 8.2 mm rain
- Córdoba in JulyArgentina · 290 kmHigh 16.0°C · Low 5.0°C · 14 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.