San Martín in Summer
In summer (December, January and February), San Martín sees average daytime highs around 32°C and overnight lows near 20°C, with 123 mm of rain over about 21 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 32°C. The sky is clear or mostly clear about 66% of the time across summer, and the air most often feels dry.
Summer is San Martín's weakest season of the year to visit on our travel score. For the whole year in context, see San Martín's year-round climate.
- Avg daytime high
- 32°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 123 mm
- 21 wet days
- Avg wind
- 11 km/h
- Travel score
- 4.5
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in San Martín in Summer
Across summer, daytime highs hold fairly steady around 32°C.
A typical summer day in San Martín reaches about 32°C and drops to 20°C overnight. The warmest of the three months is January, the coolest February.
How summer really feels in San Martín
Once humidity and wind are folded in, summer brings about 52 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Martín weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 21° | 48 | 7.8 | 13.9 | 4.0 |
| Feb | 31° / 19° | 37 | 6.3 | 13.2 | 5.0 |
| Mar | 28° / 17° | 43 | 6.2 | 12.3 | 6.9 |
| Apr | 23° / 12° | 20 | 4.3 | 11.2 | 8.2 |
| May | 19° / 8° | 13 | 2.6 | 10.3 | 7.2 |
| Jun | 15° / 4° | 6 | 1.3 | 9.9 | 5.9 |
| Jul | 15° / 3° | 6 | 1.6 | 10 | 5.9 |
| Aug | 18° / 6° | 10 | 1.9 | 10.8 | 7.6 |
| Sep | 22° / 10° | 12 | 2.3 | 11.8 | 8.4 |
| Oct | 26° / 14° | 20 | 3.9 | 12.8 | 8.1 |
| Nov | 30° / 17° | 27 | 5.1 | 13.7 | 6.1 |
| Dec | 32° / 19° | 38 | 6.7 | 14.1 | 4.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 66% of the time across summer.
Chance of precipitation in Summer
San Martín gets around 123 mm of rain over 21 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 11 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 hours in early December to 12 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.3 kWh/m².
Is summer a good time to visit San Martín?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit San Martín for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Martín in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Martín sees daytime highs around 32°C and nights near 20°C. Pack light clothes and sun protection. About 21 days see rain.
UV index in San Martín in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Martín peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 13 | 10 | 6 | 4 | 3 | 3 | 4 | 6 | 10 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 10 | Extreme |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 10 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Where is San Martín?
San Martín sits at 33.1°S, 68.5°W, 656 m above sea level, in Argentina. The nearest listed city is Rivadavia, 12 km away.
Topography around San Martín
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Martín.
Within 3 km, the terrain around San Martín has only modest variations in elevation — a maximum elevation change of 18 m around an average of 658 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 67 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,924 m.
The land around San Martín is covered by artificial surfaces (44%) within 3 km, cropland (38%), shrubs (25%) and grassland (25%) within 16 km, and shrubs (69%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Martín (-33.0834°, -68.4731°, elevation 656 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.