Las Piedras weather in December

In December, Las Piedras sees average daytime highs of 26°C and overnight lows near 17°C, with 80 mm of rain across 7.8 wet days and about 14.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 48% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 h 12 min at the start of December to 14 h 18 min by month's end. Set against the rest of the year, December is Las Piedras's 2nd-clearest and 5th-windiest month. For the whole year in context, see Las Piedras's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
17°
9th coldest
Rainfall
80 mm
7.8 wet days
Daylight
14 h 18 min
6:32 AM – 8:51 PM
Cloud cover
45%
2nd clearest
Wind
16 km/h
5th windiest
Solar energy
7.47 kWh/m²
Travel score
7.3
out of 10

Las Piedras is city in Canelones Department, Uruguay.

Density
5,194/km²
people per km²
Founded
1744

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 25°C in the first days to 27°C by the end.

A typical December day in Las Piedras reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 31°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)
12516
22516
32516
42516
52516
62516
72516
82516
92516
102516
112616
122617
132617
142617
152617
162617
172617
182617
192617
202617
212717
222718
232718
242718
252718
262718
272718
282718
292718
302718
312718

Las Piedras weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°767.214.17.1
Feb27° / 19°988.113.36.9
Mar25° / 17°968.312.37.3
Apr22° / 14°997.911.27.0
May18° / 11°807.410.26.2
Jun15° / 807.89.74.8
Jul14° / 847.49.94.4
Aug16° / 927.810.75.3
Sep17° / 10°847.911.85.9
Oct20° / 12°1139.312.96.5
Nov23° / 14°1018.113.87.3
Dec26° / 17°807.814.37.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26436
36436
46436
56436
66436
76436
86337
96337
106337
116337
126337
136337
146337
156337
166337
176337
186337
196337
206238
216238
226238
236238
246337
256337
266238
276337
286337
296337
306337
316337

Chance of precipitation in December

Any precipitation

Las Piedras gets around 80 mm of rain over 7.8 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 25% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
125
225
325
424
524
624
724
824
924
1024
1124
1225
1325
1425
1526
1626
1726
1826
1926
2026
2126
2226
2326
2426
2526
2625
2725
2825
2924
3024
3124

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 19% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
137282780
237282780
337282780
436282791
536282791
635282891
734272891
8342728101
9332729101
10322729111
11312830111
12302830121
13292830121
14272830131
15262831141
16252831161
17242731171
18232731181
19222731201
20212631211
21202630231
22192530242
23182530252
24172430262
25172429273
26162329283
27162329294
28152329294
29152329304
30142229305
31142229305

Wind in December

Winds average 16 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 12 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 6 minutes over December. Sunrise moves from 6:30 AM to 6:39 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)
114.26:308:39
214.26:308:40
314.26:308:41
414.26:308:42
514.26:308:43
614.26:308:44
714.26:308:44
814.36:308:45
914.36:308:46
1014.36:308:47
1114.36:308:47
1214.36:308:48
1314.36:318:49
1414.36:318:49
1514.36:318:50
1614.36:328:51
1714.36:328:51
1814.36:328:52
1914.36:338:52
2014.36:338:53
2114.36:338:53
2214.36:348:54
2314.36:348:54
2414.36:358:55
2514.36:358:55
2614.36:368:55
2714.36:378:56
2814.36:378:56
2914.36:388:56
3014.36:388:57
3114.36:398:57

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 2.18 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
207.5Intense
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 Las Piedras?

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

7.3
Sightseeing
1st-best month of the year
6.9
Beach & pool
2nd-best month of the year

December is one of the better times to visit Las Piedras for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Las Piedras in December

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

In December, Las Piedras sees daytime highs around 26°C and nights near 17°C. Pack sun protection. Worth having: light clothes. About 8 days see rain.

sun protectionlight clothes

Sea temperature near Las Piedras 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 18 km away) is warmest in February at about 24°C and coldest in July near 11°C.

It's comfortable for a long swim from Nov 27 to Apr 9 — about 4.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb24Refreshing
Mar22Refreshing
Apr19Cool
May16Cool
Jun13Bracing
Jul11Bracing
Aug12Bracing
Sep13Bracing
Oct16Cool
Nov19Cool
Dec22Refreshing

UV index in Las Piedras 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 Las Piedras 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 17UV 12Jun 18UV 2
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct7Very high
Nov11Extreme
Dec11Extreme
Location & terrain

Where is Las Piedras?

Las Piedras sits at 34.7°S, 56.2°W, 72 m above sea level, in Uruguay. The nearest listed city is La Paz, 3.0 km away.

Topography around Las Piedras

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

Within 3 km, the terrain around Las Piedras has only modest variations in elevation — a maximum elevation change of 61 m around an average of 58 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 90 m; within 80 km, significant variations in elevation — a maximum elevation change of 375 m.

The land around Las Piedras is covered by grassland (39%) and artificial surfaces (39%) within 3 km, grassland (45%) within 16 km, and water (35%), grassland (32%) and cropland (23%) within 80 km.

3 km
61 m
16 km
90 m
80 km
375 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: La Paz 3.0 km · Progreso 7.0 km · Delta del Tigre 14 km · Montevideo 19 km · Barros Blancos 20 km · Paso de Carrasco 21 km · Canelones 24 km · Pando 24 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 Las Piedras (-34.7302°, -56.2191°, elevation 72 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).