San Carlos in Summer
In summer (December, January and February), San Carlos sees average daytime highs around 26°C and overnight lows near 17°C, with 258 mm of rain over about 26 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 42% of the time across summer, and the air most often feels humid.
Summer is San Carlos's best season of the year to visit on our travel score. For the whole year in context, see San Carlos's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 258 mm
- 26 wet days
- Avg wind
- 16 km/h
- Travel score
- 7.1
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in San Carlos in Summer
Across summer, daytime highs hold fairly steady around 26°C.
A typical summer day in San Carlos reaches about 26°C and drops to 17°C overnight. The warmest of the three months is January, the coolest December.
San Carlos 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 | 26° / 18° | 78 | 8.3 | 14.1 | 7.1 |
| Feb | 26° / 18° | 99 | 9 | 13.3 | 6.8 |
| Mar | 24° / 17° | 92 | 9 | 12.3 | 7.2 |
| Apr | 21° / 14° | 104 | 8.9 | 11.2 | 6.7 |
| May | 18° / 11° | 83 | 7.9 | 10.2 | 6.0 |
| Jun | 15° / 9° | 91 | 8.7 | 9.7 | 4.7 |
| Jul | 14° / 7° | 94 | 9 | 9.9 | 4.3 |
| Aug | 16° / 8° | 95 | 8.5 | 10.7 | 5.1 |
| Sep | 17° / 9° | 90 | 8.5 | 11.8 | 5.6 |
| Oct | 19° / 12° | 102 | 9.7 | 12.9 | 6.3 |
| Nov | 22° / 14° | 90 | 8.3 | 13.8 | 7.0 |
| Dec | 25° / 16° | 82 | 8.5 | 14.3 | 7.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 42% of the time across summer.
Chance of precipitation in Summer
San Carlos gets around 258 mm of rain over 26 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — 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 12 min in early December to 12 h 54 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 6.9 kWh/m².
Is summer a good time to visit San Carlos?
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 one of the better times to visit San Carlos for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Carlos in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Carlos sees daytime highs around 26°C and nights near 17°C. Pack sun protection. Worth having: light clothes and rain gear. About 26 days see rain.
Sea temperature near San Carlos in Summer
The nearest coast averages about 22°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 21 km away) is warmest in February at about 23°C and coldest in July near 12°C.
It's comfortable for a long swim from Dec 12 to Apr 10 — about 3.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 22 | 23 | 22 | 20 | 17 | 14 | 12 | 12 | 13 | 15 | 18 | 20 |
| Comfort | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 20 | Cool |
| May | 17 | Cool |
| Jun | 14 | Bracing |
| Jul | 12 | Bracing |
| Aug | 12 | Bracing |
| Sep | 13 | Bracing |
| Oct | 15 | Cool |
| Nov | 18 | Cool |
| Dec | 20 | Refreshing |
UV index in San Carlos 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 San Carlos peaks around January 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 12 | 10 | 6 | 3 | 2 | 3 | 4 | 6 | 8 | 11 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 3 | Moderate |
| Jun | 2 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Where is San Carlos?
San Carlos sits at 34.8°S, 54.9°W, 28 m above sea level, in Uruguay. The nearest listed city is Maldonado, 12 km away.
Topography around San Carlos
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Carlos.
Within 3 km, the terrain around San Carlos has only modest variations in elevation — a maximum elevation change of 42 m around an average of 11 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 266 m; within 80 km, significant variations in elevation — a maximum elevation change of 498 m.
The land around San Carlos is covered by grassland (45%) and trees (22%) within 3 km, grassland (60%) within 16 km, and grassland (42%) and water (37%) within 80 km.
Uruguay travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / I / L
- 230 V · 50 Hz
- Prices
- ≈ 66% of US
- price level, 2025
- GDP per capita
- $25,216
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Homicide rate
- 11.2
- per 100k, 2023
- Road deaths
- 14.8
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 542
- 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 Carlos (-34.7912°, -54.9182°, elevation 28 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.