Climate averages 1991–2020
San Juan, Argentina weather
in October.
A warm, fairly dry month: the 6th warmest and the 10th 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 Juan, Argentina: daytime highs average 25.1°C and nights cool to about 11.8°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 21 mm of rain on roughly 4 days, which makes October a fairly dry month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 50 min on an average October day.
The nearest other city in this atlas is Rawson (5 km away). In October its highs average 24.7°C, about as warm as San Juan, Argentina, with 21 mm of rain.
Among the 67 cities listed in Argentina, San Juan, Argentina ranks 12th of 67 for the warmest October highs and joint 4th of 67 for the driest October (rainfall, lowest first). The mean October high of those 67 cities is 22.2°C; San Juan, Argentina is 2.9°C warmer than that mean.
From October to November, average highs rise by 2.9°C to 28.0°C, and monthly rainfall falls from 21 mm to 16 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 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 | 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, selected | 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
October in nearby cities
- Rawson in OctoberArgentina · 5 kmHigh 24.7°C · Low 11.2°C · 21 mm rain
- Mendoza in OctoberArgentina · 153 kmHigh 21.9°C · Low 9.9°C · 43 mm rain
- San Martín in OctoberArgentina · 172 kmHigh 24.9°C · Low 12.5°C · 20 mm rain
- Colina in OctoberChile · 274 kmHigh 21.4°C · Low 10.4°C · 59 mm rain
- Ovalle in OctoberChile · 275 kmHigh 25.2°C · Low 12.4°C · 6.3 mm rain
- San Luis in OctoberArgentina · 284 kmHigh 23.9°C · Low 12.5°C · 66 mm rain
- Peñalolén in OctoberChile · 286 kmHigh 18.9°C · Low 7.4°C · 62 mm rain
- Quilicura in OctoberChile · 289 kmHigh 20.5°C · Low 9.0°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 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.