Climate averages 1991–2020
San Martín weather
in May.
A mild, very dry month: the 9th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in San Martín: daytime highs average 17.8°C and nights cool to about 8.1°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 12 mm of rain on roughly 3 days, which makes May a very dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 26 min on an average May day.
The nearest other city in this atlas is Mendoza (41 km away). In May its highs average 15.5°C, 2.4°C cooler than San Martín, with 30 mm of rain.
Among the 67 cities listed in Argentina, San Martín ranks joint 38th of 67 for the warmest May highs and 3rd of 67 for the driest May (rainfall, lowest first). The mean May high of those 67 cities is 18.0°C; San Martín is 0.2°C cooler than that mean.
From May to June, average highs fall by 2.9°C to 14.9°C, and monthly rainfall falls from 12 mm to 5.5 mm.
The annual picture
May 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 | 22.0°C11.9°C | 11.9°C | 20 | 4.3 | 11.311 h |
| May, selected | 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
May in nearby cities
- Mendoza in MayArgentina · 41 kmHigh 15.5°C · Low 6.4°C · 30 mm rain
- Rawson in MayArgentina · 167 kmHigh 19.3°C · Low 7.1°C · 10 mm rain
- San Rafael in MayArgentina · 171 kmHigh 17.1°C · Low 6.5°C · 31 mm rain
- San Juan, Argentina in MayArgentina · 172 kmHigh 19.6°C · Low 7.6°C · 10 mm rain
- Peñalolén in MayChile · 196 kmHigh 17.2°C · Low 6.0°C · 79 mm rain
- San Luis in MayArgentina · 201 kmHigh 18.6°C · Low 9.1°C · 25 mm rain
- Puente Alto in MayChile · 204 kmHigh 17.9°C · Low 5.0°C · 79 mm rain
- Colina in MayChile · 205 kmHigh 19.7°C · Low 8.8°C · 81 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.