Juan José Castelli in Summer
In summer (December, January and February), Juan José Castelli sees average daytime highs around 33°C and overnight lows near 22°C, with 395 mm of rain over about 33 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 33°C. The sky is clear or mostly clear about 41% of the time across summer, and the air most often feels oppressive.
Summer is Juan José Castelli's weakest season of the year to visit on our travel score. For the whole year in context, see Juan José Castelli's year-round climate.
- Avg daytime high
- 33°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 395 mm
- 33 wet days
- Avg wind
- 11 km/h
- Travel score
- 3.6
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Juan José Castelli in Summer
Across summer, daytime highs hold fairly steady around 33°C.
A typical summer day in Juan José Castelli reaches about 33°C and drops to 22°C overnight. The warmest of the three months is January, the coolest December.
How summer really feels in Juan José Castelli
Once humidity and wind are folded in, summer brings about 90 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.
Juan José Castelli 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° / 23° | 124 | 11.2 | 13.4 | 3.3 |
| Feb | 32° / 22° | 137 | 11.1 | 12.9 | 3.8 |
| Mar | 30° / 21° | 137 | 11.1 | 12.2 | 4.8 |
| Apr | 27° / 18° | 117 | 9.3 | 11.4 | 6.5 |
| May | 24° / 14° | 62 | 7.8 | 10.7 | 7.2 |
| Jun | 22° / 13° | 43 | 6.8 | 10.4 | 7.1 |
| Jul | 22° / 11° | 31 | 5.8 | 10.5 | 7.6 |
| Aug | 25° / 13° | 40 | 4.5 | 11.1 | 8.1 |
| Sep | 28° / 15° | 58 | 6.7 | 11.8 | 7.0 |
| Oct | 30° / 18° | 120 | 10 | 12.6 | 5.2 |
| Nov | 31° / 20° | 140 | 10.1 | 13.3 | 4.6 |
| Dec | 33° / 22° | 135 | 11.1 | 13.6 | 3.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 41% of the time across summer.
Chance of precipitation in Summer
Juan José Castelli gets around 395 mm of rain over 33 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — 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 13 h 30 min in early December to 12 h 36 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 6.5 kWh/m².
Is summer a good time to visit Juan José Castelli?
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 weaker month for outdoor sightseeing in Juan José Castelli. The water and warmth also suit a beach or pool day.
What to pack for Juan José Castelli in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Juan José Castelli sees daytime highs around 33°C and nights near 22°C. Pack light clothes and sun protection. Worth having: rain gear. About 33 days see rain.
UV index in Juan José Castelli in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Juan José Castelli peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 15 | 14 | 12 | 9 | 6 | 5 | 5 | 6 | 8 | 7 | 12 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate | High | Very high | High | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 6 | High |
| Jun | 5 | Moderate |
| Jul | 5 | Moderate |
| Aug | 6 | High |
| Sep | 8 | Very high |
| Oct | 7 | High |
| Nov | 12 | Extreme |
| Dec | 14 | Extreme |
Air quality in Juan José Castelli in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Juan José Castelli is worst in August — around 31 µg/m³ PM2.5 (moderate), about 5.1× the cleanest month (April, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 10 | 8 | 6 | 6 | 7 | 15 | 31 | 29 | 18 | 10 | 9 |
| Level | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 10 | Good |
| Mar | 8 | Good |
| Apr | 6 | Good |
| May | 6 | Good |
| Jun | 7 | Good |
| Jul | 15 | Moderate |
| Aug | 31 | Moderate |
| Sep | 29 | Moderate |
| Oct | 18 | Moderate |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Juan José Castelli?
Juan José Castelli sits at 25.9°S, 60.6°W, 113 m above sea level, in Argentina. The nearest listed city is Tres Isletas, 48 km away.
Topography around Juan José Castelli
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Juan José Castelli.
Within 3 km, the terrain around Juan José Castelli has only modest variations in elevation — a maximum elevation change of 9 m around an average of 110 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 20 m; within 80 km, only modest variations in elevation — a maximum elevation change of 64 m.
The land around Juan José Castelli is covered by cropland (30%), artificial surfaces (29%) and grassland (22%) within 3 km, trees (56%) and cropland (30%) within 16 km, and trees (75%) 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 Juan José Castelli (-25.9466°, -60.6201°, elevation 113 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.