Piriapolis weather in December

In December, Piriapolis sees average daytime highs of 25°C and overnight lows near 16°C, with 80 mm of rain across 8.5 wet days and about 14.3 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 45% 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 Piriapolis's 2nd-clearest and 6th-windiest month. For the whole year in context, see Piriapolis's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
16°
9th coldest
Rainfall
80 mm
8.5 wet days
Daylight
14 h 18 min
6:27 AM – 8:47 PM
Cloud cover
47%
2nd clearest
Wind
16 km/h
6th windiest
Solar energy
7.32 kWh/m²
Travel score
7.3
out of 10

Piriapolis is city of Uruguay.

Density
319/km²
people per km²
Founded
1893

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 26°C by the end.

A typical December day in Piriapolis reaches about 25°C in the afternoon and slips back to 16°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 30°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52415
62416
72416
82416
92416
102516
112516
122516
132516
142516
152516
162516
172517
182517
192517
202517
212617
222617
232617
242617
252617
262617
272618
282618
292618
302618
312618

Piriapolis weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 18°707.614.17.2
Feb26° / 18°978.913.36.9
Mar24° / 17°95912.37.2
Apr21° / 14°998.611.16.8
May18° / 11°767.910.26.0
Jun15° / 898.39.74.7
Jul14° / 908.79.94.3
Aug16° / 938.610.75.1
Sep17° / 10°918.311.85.6
Oct20° / 12°999.412.96.3
Nov22° / 14°857.813.87.2
Dec25° / 16°808.514.37.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36139
46238
56139
66238
76139
86139
96139
106139
116238
126238
136238
146139
156139
166139
176139
186139
196139
206139
216139
226238
236139
246139
256139
266238
276238
286238
296238
306337
316337

Chance of precipitation in December

Any precipitation

Piriapolis gets around 80 mm of rain over 8.5 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 27% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
124
223
323
424
524
624
725
825
926
1026
1127
1227
1328
1428
1529
1629
1730
1830
1930
2030
2129
2229
2329
2428
2528
2628
2727
2827
2926
3026
3126

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
139262780
239262780
339262780
438262780
538272880
637272880
736272880
835272990
934272990
10332730100
11322830100
12312830111
13302831111
14292731121
15272732131
16262732141
17252632161
18242632171
19232532181
20222433201
21212433211
22202333232
23192233242
24192232252
25182132263
26182132273
27172032274
28172031284
29162031285
30162031285
31152031295

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 6:26 AM to 6:35 AM, and sunset from 8:36 PM to 8:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.26:268:36
214.26:268:37
314.26:268:38
414.26:268:39
514.26:268:39
614.26:268:40
714.36:268:41
814.36:268:42
914.36:268:42
1014.36:268:43
1114.36:268:44
1214.36:268:45
1314.36:278:45
1414.36:278:46
1514.36:278:47
1614.36:278:47
1714.36:288:48
1814.36:288:48
1914.36:288:49
2014.36:298:49
2114.36:298:50
2214.36:308:50
2314.36:308:51
2414.36:318:51
2514.36:318:52
2614.36:328:52
2714.36:328:52
2814.36:338:53
2914.36:348:53
3014.36:348:53
3114.36:358:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.32 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 7.32 kWh/m² in December across the year — December's 7.32 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.3Intense
147.3Intense
157.3Intense
167.3Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.3Intense
237.3Intense
247.3Intense
257.3Intense
267.3Intense
277.3Intense
287.3Intense
297.3Intense
307.3Intense
317.3Intense
Planning a trip in December

Is December a good time to visit Piriapolis?

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
6.6
Beach & pool
2nd-best month of the year

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

What to pack for Piriapolis in December

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

In December, Piriapolis sees daytime highs around 25°C and nights near 16°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Piriapolis in December

The nearest coast averages about 21°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 February at about 23°C and coldest in July near 11°C.

It's comfortable for a long swim from Dec 9 to Apr 10 — about 4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb23Refreshing
Mar22Refreshing
Apr20Cool
May17Cool
Jun13Bracing
Jul11Bracing
Aug12Bracing
Sep13Bracing
Oct16Cool
Nov18Cool
Dec21Refreshing

UV index in Piriapolis 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 Piriapolis peaks around January 16 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 16UV 12Jun 18UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar10Very high
Apr6High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Piriapolis?

Piriapolis sits at 34.9°S, 55.3°W, 0 m above sea level, in Uruguay. The nearest listed city is Maldonado, 30 km away.

MaldonadoPunta del EsteSan CarlosMinasPandoBarros BlancosPaso de CarrascoMontevideo

Topography around Piriapolis

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

Within 3 km, the terrain around Piriapolis has only modest variations in elevation — a maximum elevation change of 249 m around an average of 32 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 501 m; within 80 km, significant variations in elevation — a maximum elevation change of 494 m.

The land around Piriapolis is covered by trees (31%), water (28%) and grassland (21%) within 3 km, water (55%) and grassland (24%) within 16 km, and grassland (42%) and water (38%) within 80 km.

3 km
249 m
16 km
501 m
80 km
494 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Maldonado 30 km · Punta del Este 32 km · San Carlos 34 km · Minas 54 km · Pando 65 km · Barros Blancos 68 km · Paso de Carrasco 71 km · Montevideo 83 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 Piriapolis (-34.8629°, -55.2747°, elevation 0 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).