Colonia del Sacramento weather in December

In December, Colonia del Sacramento sees average daytime highs of 26°C and overnight lows near 19°C, with 84 mm of rain across 7.7 wet days and about 14.3 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 27°C by the end. The sky is clear or mostly clear about 53% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is Colonia del Sacramento's 2nd-clearest and 6th-windiest month. For the whole year in context, see Colonia del Sacramento's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
84 mm
7.7 wet days
Daylight
14 h 18 min
6:39 AM – 8:56 PM
Cloud cover
42%
2nd clearest
Wind
17 km/h
6th windiest
Solar energy
7.57 kWh/m²
Travel score
7.4
out of 10

Colonia del Sacramento is City in Uruguay, departmental capital of Colonia.

Density
1,407/km²
people per km²
Founded
1680

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 27°C by the end.

A typical December day in Colonia del Sacramento reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12418
22418
32418
42518
52518
62518
72518
82518
92518
102518
112518
122519
132519
142519
152619
162619
172619
182619
192619
202619
212619
222620
232620
242620
252620
262720
272720
282720
292720
302720
312720

Colonia del Sacramento weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 21°816.9147.3
Feb26° / 20°1038.113.37.1
Mar24° / 19°1017.612.37.5
Apr21° / 15°977.911.26.9
May17° / 12°706.610.26.0
Jun14° / 10°717.29.74.5
Jul13° / 746.89.94.1
Aug15° / 10°756.710.75.1
Sep17° / 12°817.611.85.8
Oct20° / 14°1119.412.96.5
Nov23° / 17°1027.913.87.3
Dec26° / 19°847.714.37.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26634
36634
46634
56634
66634
76733
86733
96733
106634
116634
126634
136634
146634
156634
166634
176634
186733
196733
206634
216634
226634
236733
246733
256733
266733
276733
286733
296733
306733
316733

Chance of precipitation in December

Any precipitation

Colonia del Sacramento gets around 84 mm of rain over 7.7 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
125
225
325
424
524
624
725
825
925
1025
1125
1225
1325
1426
1526
1626
1726
1826
1926
2026
2125
2225
2325
2424
2524
2624
2724
2823
2923
3023
3123

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the humid band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1222832171
2222832171
3222832172
4212832182
5212732182
6202732192
7202632202
8192632212
9192632212
10182532222
11172532233
12162532243
13152432253
14152432263
15142432274
16132331294
17132231304
18122230315
19112130326
20112030337
21101929338
22101929349
231018283410
24917273511
25917273512
26916273513
27816263514
28816263515
29715273416
30715273417
31715273418

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over December. Sunrise moves from 6:37 AM to 6:46 AM, and sunset from 8:45 PM to 9:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:378:45
214.26:378:46
314.26:378:47
414.26:378:48
514.26:378:49
614.26:378:49
714.26:378:50
814.26:378:51
914.26:378:52
1014.36:378:52
1114.36:378:53
1214.36:388:54
1314.36:388:54
1414.36:388:55
1514.36:388:56
1614.36:398:56
1714.36:398:57
1814.36:398:58
1914.36:408:58
2014.36:408:59
2114.36:418:59
2214.36:419:00
2314.36:429:00
2414.36:429:00
2514.36:439:01
2614.36:439:01
2714.36:449:02
2814.36:449:02
2914.36:459:02
3014.36:469:03
3114.36:469:03

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.57 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 7.57 kWh/m² in December across the year — December's 7.57 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.5Intense
47.5Intense
57.5Intense
67.5Intense
77.6Intense
87.6Intense
97.6Intense
107.6Intense
117.6Intense
127.6Intense
137.6Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.5Intense
197.5Intense
207.5Intense
217.5Intense
227.5Intense
237.5Intense
247.5Intense
257.5Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.5Intense
317.5Intense
Planning a trip in December

Is December a good time to visit Colonia del Sacramento?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.4
Sightseeing
2nd-best month of the year
6.9
Beach & pool
2nd-best month of the year

December 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 December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Colonia del Sacramento sees daytime highs around 26°C and nights near 19°C. Pack sun protection. Worth having: light clothes. About 8 days see rain.

sun protectionlight clothes

Sea temperature near Colonia del Sacramento in December

The nearest coast averages about 23°C in December — 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.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar23Refreshing
Apr20Refreshing
May17Cool
Jun14Bracing
Jul13Bracing
Aug13Bracing
Sep15Bracing
Oct18Cool
Nov21Refreshing
Dec23Refreshing

UV index in Colonia del Sacramento in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme
Location & terrain

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.

EnsenadaBerissoQuilmesBerazateguiRetiroBuenos AiresLa PlataSarandí

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.

3 km
48 m
16 km
87 m
80 km
189 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Ensenada 45 km · Berisso 46 km · Quilmes 48 km · Berazategui 48 km · Retiro 52 km · Buenos Aires 52 km · La Plata 52 km · Sarandí 52 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
none 47%Roman Catholic 37%Protestant 15%atheist 10%

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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).