Santa Lucía weather in December

In December, Santa Lucía sees average daytime highs of 28°C and overnight lows near 16°C, with 84 mm of rain across 8 wet days and about 14.3 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 29°C by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels dry.

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 Santa Lucía's 2nd-clearest and 6th-windiest month. For the whole year in context, see Santa Lucía's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
84 mm
8 wet days
Daylight
14 h 18 min
6:33 AM – 8:51 PM
Cloud cover
46%
2nd clearest
Wind
14 km/h
6th windiest
Solar energy
7.47 kWh/m²
Travel score
6.7
out of 10

Santa Lucía is city in the Canelones Department of southern Uruguay.

Density
429/km²
people per km²
Founded
1782

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 26°C in the first days to 29°C by the end.

A typical December day in Santa Lucía reaches about 28°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 32°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°35°151015202531
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52615
62715
72716
82716
92716
102716
112716
122716
132716
142716
152716
162816
172817
182817
192817
202817
212817
222817
232817
242817
252817
262917
272918
282918
292918
302918
312918

Santa Lucía weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°817.8146.0
Feb28° / 18°1008.313.36.4
Mar26° / 16°988.212.37.1
Apr22° / 13°99811.27.1
May19° / 10°816.910.26.4
Jun16° / 777.39.75.1
Jul15° / 787.39.94.8
Aug17° / 897.610.75.8
Sep19° / 837.911.86.3
Oct21° / 12°1129.712.96.6
Nov24° / 14°1028.313.87.2
Dec28° / 16°84814.36.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% 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 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
46139
56040
66139
76139
86139
96139
106238
116337
126337
136337
146337
156337
166238
176238
186238
196238
206139
216139
226139
236139
246040
256040
266040
276040
286040
296040
306040
316040

Chance of precipitation in December

Any precipitation

Santa Lucía gets around 84 mm of rain over 8 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
125
225
325
425
525
625
725
825
925
1025
1125
1226
1326
1427
1527
1627
1728
1828
1928
2028
2128
2227
2327
2427
2527
2627
2726
2826
2925
3025
3125

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
143252470
243252570
343252570
443252570
542252580
641252581
741262581
840262581
939272591
1038272691
1136282691
12352826101
13342926101
14332927111
15322927111
16312828121
17292829131
18282829141
19272730152
20262730162
21242630172
22232630182
23232530193
24222530203
25212430213
26212430224
27202330234
28202329234
29192329245
30192329255
31182329255

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light 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 6:31 AM to 6:40 AM, and sunset from 8:39 PM to 8:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:318:39
214.26:318:40
314.26:318:41
414.26:318:42
514.26:318:43
614.26:318:44
714.26:318:44
814.26:318:45
914.26:318:46
1014.36:318:47
1114.36:328:47
1214.36:328:48
1314.36:328:49
1414.36:328:49
1514.36:338:50
1614.36:338:51
1714.36:338:51
1814.36:348:52
1914.36:348:52
2014.36:348:53
2114.36:358:53
2214.36:358:54
2314.36:368:54
2414.36:368:55
2514.36:378:55
2614.36:378:55
2714.36:388:56
2814.36:398:56
2914.36:398:56
3014.36:408:57
3114.36:408:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.47 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.21 kWh/m² to a high of 7.47 kWh/m² in December across the year — December's 7.47 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.4Intense
37.4Intense
47.4Intense
57.4Intense
67.5Intense
77.5Intense
87.5Intense
97.5Intense
107.5Intense
117.5Intense
127.5Intense
137.5Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.5Intense
197.5Intense
207.4Intense
217.4Intense
227.4Intense
237.4Intense
247.4Intense
257.4Intense
267.4Intense
277.4Intense
287.4Intense
297.4Intense
307.4Intense
317.4Intense
Planning a trip in December

Is December a good time to visit Santa Lucía?

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

6.7
Sightseeing
4th-best month of the year
7.2
Beach & pool
2nd-best month of the year

December is a reasonable time to visit Santa Lucía for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santa Lucía in December

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

In December, Santa Lucía sees daytime highs around 28°C and nights near 16°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

Sea temperature near Santa Lucía in December

The nearest coast averages about 22°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 47 km away) is warmest in January at about 24°C and coldest in July near 11°C.

It's comfortable for a long swim from Nov 23 to Apr 9 — about 4.5 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Refreshing
Mar23Refreshing
Apr19Cool
May16Cool
Jun13Bracing
Jul11Bracing
Aug12Bracing
Sep14Bracing
Oct17Cool
Nov19Cool
Dec22Refreshing

UV index in Santa Lucía in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa Lucía peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 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 16UV 13Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec11Extreme
Location & terrain

Where is Santa Lucía?

Santa Lucía sits at 34.5°S, 56.4°W, 24 m above sea level, in Uruguay. The nearest listed city is Canelones, 13 km away.

San José de MayoLas PiedrasDelta del TigreLa PazFloridaBarros Blancos

Topography around Santa Lucía

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Lucía.

Within 3 km, the terrain around Santa Lucía has only modest variations in elevation — a maximum elevation change of 38 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 63 m; within 80 km, only modest variations in elevation — a maximum elevation change of 202 m.

The land around Santa Lucía is covered by grassland (41%) and trees (34%) within 3 km, cropland (42%) and grassland (38%) within 16 km, and grassland (40%), cropland (27%) and water (25%) within 80 km.

3 km
38 m
16 km
63 m
80 km
202 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Canelones 13 km · Progreso 29 km · San José de Mayo 32 km · Las Piedras 35 km · Delta del Tigre 35 km · La Paz 37 km · Florida 42 km · Barros Blancos 49 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 Santa Lucía (-34.4533°, -56.3906°, elevation 24 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).