Tres Arroyos in Summer
In summer (December, January and February), Tres Arroyos sees average daytime highs around 28°C and overnight lows near 15°C, with 227 mm of rain over about 27 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 28°C. The sky is clear or mostly clear about 54% of the time across summer, and the air most often feels dry.
Summer is Tres Arroyos's 2nd-best season to visit on our travel score. For the whole year in context, see Tres Arroyos's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 15°C
- Rainfall
- 227 mm
- 27 wet days
- Avg wind
- 16 km/h
- Travel score
- 6.6
- 2nd-best season
- Months
- Dec · Jan · Feb
Temperature in Tres Arroyos in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Tres Arroyos reaches about 28°C and drops to 15°C overnight. The warmest of the three months is January, the coolest December.
How summer really feels in Tres Arroyos
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Tres Arroyos 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 | 28° / 15° | 74 | 9.7 | 14.4 | 6.1 |
| Feb | 27° / 15° | 75 | 8.3 | 13.5 | 6.9 |
| Mar | 25° / 13° | 76 | 8.2 | 12.3 | 7.4 |
| Apr | 21° / 10° | 64 | 7.2 | 11 | 6.9 |
| May | 17° / 7° | 46 | 6.2 | 9.9 | 5.7 |
| Jun | 13° / 4° | 33 | 5.2 | 9.4 | 4.2 |
| Jul | 13° / 4° | 38 | 6.1 | 9.6 | 3.8 |
| Aug | 15° / 5° | 47 | 5.8 | 10.5 | 4.9 |
| Sep | 17° / 6° | 51 | 6.9 | 11.7 | 5.8 |
| Oct | 20° / 9° | 78 | 9.4 | 13 | 6.4 |
| Nov | 23° / 11° | 83 | 9.3 | 14.1 | 7.1 |
| Dec | 27° / 14° | 78 | 8.8 | 14.6 | 6.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 54% of the time across summer.
Chance of precipitation in Summer
Tres Arroyos gets around 227 mm of rain over 27 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 16 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 30 min in early December to 13 hours 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 Tres Arroyos?
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 Tres Arroyos for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Tres Arroyos in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tres Arroyos sees daytime highs around 28°C and nights near 15°C. Pack light clothes and sun protection. Worth having: rain gear. About 27 days see rain.
Sea temperature near Tres Arroyos in Summer
The nearest coast averages about 20°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 56 km away) is warmest in February at about 21°C and coldest in August near 10°C.
It's comfortable for a long swim from Jan 8 to Mar 21 — about 2.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 21 | 20 | 18 | 15 | 12 | 10 | 10 | 11 | 13 | 16 | 18 |
| Comfort | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 21 | Refreshing |
| Mar | 20 | Refreshing |
| Apr | 18 | Cool |
| May | 15 | Cool |
| Jun | 12 | Bracing |
| Jul | 10 | Bracing |
| Aug | 10 | Bracing |
| Sep | 11 | Bracing |
| Oct | 13 | Bracing |
| Nov | 16 | Cool |
| Dec | 18 | Cool |
UV index in Tres Arroyos in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Tres Arroyos peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 12 | 8 | 6 | 3 | 2 | 2 | 3 | 5 | 7 | 10 | 13 |
| Level | Extreme | Extreme | Very high | High | Moderate | Low | Moderate | Moderate | Moderate | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 8 | Very high |
| Apr | 6 | High |
| May | 3 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Moderate |
| Aug | 3 | Moderate |
| Sep | 5 | Moderate |
| Oct | 7 | Very high |
| Nov | 10 | Very high |
| Dec | 13 | Extreme |
Where is Tres Arroyos?
Tres Arroyos sits at 38.4°S, 60.3°W, 100 m above sea level, in Argentina. The nearest listed city is Benito Juárez, 89 km away.
Topography around Tres Arroyos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tres Arroyos.
Within 3 km, the terrain around Tres Arroyos has only modest variations in elevation — a maximum elevation change of 21 m around an average of 109 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 93 m; within 80 km, significant variations in elevation — a maximum elevation change of 268 m.
The land around Tres Arroyos is covered by artificial surfaces (43%) and grassland (41%) within 3 km, cropland (81%) within 16 km, and cropland (61%) and grassland (28%) 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 Tres Arroyos (-38.3769°, -60.2756°, elevation 100 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.