San Carlos in Winter
In winter (June, July and August), San Carlos sees average daytime highs around 15°C and overnight lows near 8°C, with 280 mm of rain over about 26 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.
Across winter, daytime highs hold fairly steady around 15°C. The sky is clear or mostly clear about 29% of the time across winter, and the air most often feels dry.
Winter is San Carlos's weakest 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
- 15°C
- coldest season of the year
- Avg overnight low
- 8°C
- Rainfall
- 280 mm
- 26 wet days
- Avg wind
- 16 km/h
- Travel score
- 4.7
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in San Carlos in Winter
Across winter, daytime highs hold fairly steady around 15°C.
A typical winter day in San Carlos reaches about 15°C and drops to 8°C overnight. The warmest of the three months is August, the coolest July.
San Carlos weather by month
How the three winter months (June, July and August) 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 Winter
The sky is clear or mostly clear about 29% of the time across winter.
Chance of precipitation in Winter
San Carlos gets around 280 mm of rain over 26 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 16 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 h 48 min in early June to 11 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.6 kWh/m².
Is winter a good time to visit San Carlos?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit San Carlos for sightseeing.
What to pack for San Carlos in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, San Carlos sees daytime highs around 15°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 26 days see rain.
Sea temperature near San Carlos in Winter
The nearest coast averages about 12°C across winter — 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 Winter
Clear-sky midday UV across winter averages around 3 — enough to warrant sun protection. 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.