Climate averages 1991–2020
San Martín weather
in April.
A warm, fairly dry month: the 7th warmest and the joint 6th 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 Martín: daytime highs average 22.0°C and nights cool to about 11.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 20 mm of rain on roughly 4 days, which makes April a fairly dry month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 18 min on an average April day.
The nearest other city in this atlas is Mendoza (41 km away). In April its highs average 19.4°C, 2.6°C cooler than San Martín, with 40 mm of rain.
Among the 67 cities listed in Argentina, San Martín ranks joint 27th of 67 for the warmest April highs and 4th of 67 for the driest April (rainfall, lowest first). The mean April high of those 67 cities is 21.8°C; San Martín is 0.2°C warmer than that mean.
From April to May, average highs fall by 4.2°C to 17.8°C, and monthly rainfall falls from 20 mm to 12 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 Martín climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.3°C20.0°C | 20.0°C | 48 | 7.7 | 14.114 h |
| February | 29.7°C18.6°C | 18.6°C | 38 | 6.4 | 13.313 h |
| March | 26.7°C16.3°C | 16.3°C | 43 | 6.2 | 12.312 h |
| April, selected | 22.0°C11.9°C | 11.9°C | 20 | 4.3 | 11.311 h |
| May | 17.8°C8.1°C | 8.1°C | 12 | 2.6 | 10.410 h |
| June | 14.9°C4.4°C | 4.4°C | 5.5 | 1.3 | 10.010 h |
| July | 14.5°C3.2°C | 3.2°C | 5.6 | 1.6 | 10.210 h |
| August | 17.7°C5.3°C | 5.3°C | 10 | 1.9 | 10.911 h |
| September | 21.1°C8.5°C | 8.5°C | 11 | 2.3 | 11.912 h |
| October | 24.9°C12.5°C | 12.5°C | 20 | 3.9 | 12.913 h |
| November | 28.4°C16.0°C | 16.0°C | 27 | 5.1 | 13.814 h |
| December | 30.9°C18.8°C | 18.8°C | 39 | 6.7 | 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
April in nearby cities
- Mendoza in AprilArgentina · 41 kmHigh 19.4°C · Low 10.2°C · 40 mm rain
- Rawson in AprilArgentina · 167 kmHigh 22.9°C · Low 11.1°C · 18 mm rain
- San Rafael in AprilArgentina · 171 kmHigh 20.9°C · Low 10.1°C · 42 mm rain
- San Juan, Argentina in AprilArgentina · 172 kmHigh 23.2°C · Low 11.6°C · 18 mm rain
- Peñalolén in AprilChile · 196 kmHigh 21.0°C · Low 10.1°C · 39 mm rain
- San Luis in AprilArgentina · 201 kmHigh 21.8°C · Low 12.5°C · 53 mm rain
- Puente Alto in AprilChile · 204 kmHigh 21.8°C · Low 8.8°C · 39 mm rain
- Colina in AprilChile · 205 kmHigh 23.5°C · Low 12.8°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 Martín) is explained once on the San Martín year overview and on the Sources, method and limits page.