Colonia del Sacramento in Summer
In summer (December, January and February), Colonia del Sacramento sees average daytime highs around 26°C and overnight lows near 20°C, with 268 mm of rain over about 23 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 53% of the time across summer, and the air most often feels muggy.
Summer is Colonia del Sacramento's best season of the year to visit on our travel score. For the whole year in context, see Colonia del Sacramento's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 268 mm
- 23 wet days
- Avg wind
- 16 km/h
- Travel score
- 7.3
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Colonia del Sacramento in Summer
Across summer, daytime highs hold fairly steady around 26°C.
A typical summer day in Colonia del Sacramento reaches about 26°C and drops to 20°C overnight. The warmest of the three months is January, the coolest December.
Colonia del Sacramento 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 | 27° / 21° | 81 | 6.9 | 14 | 7.3 |
| Feb | 26° / 20° | 103 | 8.1 | 13.3 | 7.1 |
| Mar | 24° / 19° | 101 | 7.6 | 12.3 | 7.5 |
| Apr | 21° / 15° | 97 | 7.9 | 11.2 | 6.9 |
| May | 17° / 12° | 70 | 6.6 | 10.2 | 6.0 |
| Jun | 14° / 10° | 71 | 7.2 | 9.7 | 4.5 |
| Jul | 13° / 8° | 74 | 6.8 | 9.9 | 4.1 |
| Aug | 15° / 10° | 75 | 6.7 | 10.7 | 5.1 |
| Sep | 17° / 12° | 81 | 7.6 | 11.8 | 5.8 |
| Oct | 20° / 14° | 111 | 9.4 | 12.9 | 6.5 |
| Nov | 23° / 17° | 102 | 7.9 | 13.8 | 7.3 |
| Dec | 26° / 19° | 84 | 7.7 | 14.3 | 7.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 53% of the time across summer.
Chance of precipitation in Summer
Colonia del Sacramento gets around 268 mm of rain over 23 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — 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 06 min 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 7.1 kWh/m².
Is summer a good time to visit Colonia del Sacramento?
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 Colonia del Sacramento for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Colonia del Sacramento in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Colonia del Sacramento sees daytime highs around 26°C and nights near 20°C. Pack sun protection. Worth having: light clothes and rain gear. About 23 days see rain.
Sea temperature near Colonia del Sacramento in Summer
The nearest coast averages about 24°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in January at about 25°C and coldest in July near 13°C.
It's comfortable for a long swim from Nov 9 to Apr 19 — about 5.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 25 | 25 | 23 | 20 | 17 | 14 | 13 | 13 | 15 | 18 | 21 | 23 |
| Comfort | Warm | Warm | Refreshing | Refreshing | Cool | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 25 | Warm |
| Mar | 23 | Refreshing |
| Apr | 20 | Refreshing |
| May | 17 | Cool |
| Jun | 14 | Bracing |
| Jul | 13 | Bracing |
| Aug | 13 | Bracing |
| Sep | 15 | Bracing |
| Oct | 18 | Cool |
| Nov | 21 | Refreshing |
| Dec | 23 | Refreshing |
UV index in Colonia del Sacramento 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 Colonia del Sacramento peaks around January 15 at about 13 (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) | 13 | 11 | 10 | 6 | 4 | 3 | 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 | 13 | Extreme |
| Feb | 11 | Extreme |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Where is Colonia del Sacramento?
Colonia del Sacramento sits at 34.5°S, 57.8°W, 30 m above sea level, in Uruguay. The nearest listed city is Ensenada, 45 km away.
Topography around Colonia del Sacramento
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Colonia del Sacramento.
Within 3 km, the terrain around Colonia del Sacramento has only modest variations in elevation — a maximum elevation change of 48 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 87 m; within 80 km, only modest variations in elevation — a maximum elevation change of 189 m.
The land around Colonia del Sacramento is covered by water (49%) within 3 km, water (65%) within 16 km, and water (37%), grassland (23%) and cropland (23%) 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 Colonia del Sacramento (-34.4626°, -57.8398°, elevation 30 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.