Climate averages 1991–2020
San Juan, Argentina weather
in April.
A warm, fairly dry month: the 7th warmest and the 8th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
April is a warm month in San Juan, Argentina: daytime highs average 23.2°C and nights cool to about 11.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 18 mm of rain on roughly 3 days, which makes April a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 20 min on an average April day.
The nearest other city in this atlas is Rawson (5 km away). In April its highs average 22.9°C, about as warm as San Juan, Argentina, with 18 mm of rain.
Among the 67 cities listed in Argentina, San Juan, Argentina ranks 13th of 67 for the warmest April highs and joint 1st of 67 for the driest April (rainfall, lowest first). The mean April high of those 67 cities is 21.8°C; San Juan, Argentina is 1.4°C warmer than that mean.
From April to May, average highs fall by 3.6°C to 19.6°C, and monthly rainfall falls from 18 mm to 10 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Rawson in AprilArgentina · 5 kmHigh 22.9°C · Low 11.1°C · 18 mm rain
- Mendoza in AprilArgentina · 153 kmHigh 19.4°C · Low 10.2°C · 40 mm rain
- San Martín in AprilArgentina · 172 kmHigh 22.0°C · Low 11.9°C · 20 mm rain
- Colina in AprilChile · 274 kmHigh 23.5°C · Low 12.8°C · 38 mm rain
- Ovalle in AprilChile · 275 kmHigh 25.5°C · Low 14.2°C · 5.1 mm rain
- San Luis in AprilArgentina · 284 kmHigh 21.8°C · Low 12.5°C · 53 mm rain
- Peñalolén in AprilChile · 286 kmHigh 21.0°C · Low 10.1°C · 39 mm rain
- Quilicura in AprilChile · 289 kmHigh 22.4°C · Low 11.3°C · 38 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.