Climate averages 1991–2020
San Juan, Argentina 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 Juan, Argentina: daytime highs average 16.4°C and nights cool to about 2.9°C. By daytime temperature it is the coolest month of the year.
Expect about 8.2 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 18 min on an average July day.
The nearest other city in this atlas is Rawson (5 km away). In July its highs average 16.2°C, about as warm as San Juan, Argentina, with 8.2 mm of rain.
Among the 67 cities listed in Argentina, San Juan, Argentina ranks joint 14th of 67 for the warmest July highs and joint 2nd of 67 for the driest July (rainfall, lowest first). The mean July high of those 67 cities is 14.6°C; San Juan, Argentina is 1.8°C warmer than that mean.
From July to August, average highs rise by 3.0°C to 19.4°C, and monthly rainfall rises from 8.2 mm to 10 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 Juan, Argentina climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.0°C19.2°C | 19.2°C | 17 | 3.2 | 13.914 h |
| February | 29.7°C18.0°C | 18.0°C | 20 | 3.4 | 13.213 h |
| March | 27.2°C15.8°C | 15.8°C | 24 | 3.9 | 12.312 h |
| April | 23.2°C11.6°C | 11.6°C | 18 | 3.3 | 11.311 h |
| May | 19.6°C7.6°C | 7.6°C | 10 | 2.6 | 10.511 h |
| June | 17.4°C4.1°C | 4.1°C | 7.8 | 2.0 | 10.110 h |
| July, selected | 16.4°C2.9°C | 2.9°C | 8.2 | 2.2 | 10.310 h |
| August | 19.4°C5.0°C | 5.0°C | 10 | 2.3 | 11.011 h |
| September | 21.8°C8.0°C | 8.0°C | 17 | 3.3 | 11.912 h |
| October | 25.1°C11.8°C | 11.8°C | 21 | 3.5 | 12.813 h |
| November | 28.0°C15.0°C | 15.0°C | 16 | 3.2 | 13.714 h |
| December | 30.3°C17.7°C | 17.7°C | 22 | 3.3 | 14.214 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
- Rawson in JulyArgentina · 5 kmHigh 16.2°C · Low 2.3°C · 8.2 mm rain
- Mendoza in JulyArgentina · 153 kmHigh 12.3°C · Low 1.5°C · 19 mm rain
- San Martín in JulyArgentina · 172 kmHigh 14.5°C · Low 3.2°C · 5.6 mm rain
- Colina in JulyChile · 274 kmHigh 15.6°C · Low 4.8°C · 96 mm rain
- Ovalle in JulyChile · 275 kmHigh 19.6°C · Low 7.5°C · 23 mm rain
- San Luis in JulyArgentina · 284 kmHigh 15.9°C · Low 5.0°C · 9.1 mm rain
- Peñalolén in JulyChile · 286 kmHigh 12.8°C · Low 1.8°C · 97 mm rain
- Quilicura in JulyChile · 289 kmHigh 14.7°C · Low 3.3°C · 96 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 Juan) is explained once on the San Juan, Argentina year overview and on the Sources, method and limits page.
Rawson lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.