Mar del Tuyú weather in December

In December, Mar del Tuyú sees average daytime highs of 22°C and overnight lows near 18°C, with 65 mm of rain across 7.9 wet days and about 14.5 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 23°C by the end. The sky is clear or mostly clear about 50% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of December to 14 h 30 min by month's end. Set against the rest of the year, December is Mar del Tuyú's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Mar del Tuyú's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
18°
9th coldest
Rainfall
65 mm
7.9 wet days
Daylight
14 h 30 min
5:28 AM – 7:58 PM
Cloud cover
45%
2nd clearest
Wind
22 km/h
2nd windiest
Solar energy
7.67 kWh/m²
Travel score
7.2
out of 10

Mar del Tuyú is human settlement in Argentina.

Founded
1945

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 21°C in the first days to 23°C by the end.

A typical December day in Mar del Tuyú reaches about 22°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°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°151015202531
Avg high (°C)Avg low (°C)
12016
22016
32116
42117
52117
62117
72117
82117
92117
102117
112117
122117
132217
142217
152218
162218
172218
182218
192218
202218
212218
222218
232218
242219
252319
262319
272319
282319
292319
302319
312319

Mar del Tuyú weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 19°757.714.27.5
Feb23° / 20°847.613.47.4
Mar22° / 18°778.212.37.1
Apr19° / 15°937.511.16.5
May16° / 12°607.110.15.2
Jun13° / 717.29.63.8
Jul11° / 687.19.83.1
Aug12° / 77710.63.6
Sep14° / 10°747.411.84.2
Oct16° / 13°859.312.95.3
Nov19° / 15°818.513.96.5
Dec22° / 18°657.914.57.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36238
46238
56238
66238
76238
86238
96238
106337
116337
126436
136436
146436
156535
166436
176436
186436
196535
206535
216535
226535
236535
246535
256535
266535
276535
286535
296535
306535
316535

Chance of precipitation in December

Any precipitation

Mar del Tuyú gets around 65 mm of rain over 7.9 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 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
125
225
325
425
525
625
725
825
925
1025
1125
1225
1325
1425
1525
1626
1726
1826
1926
2026
2126
2226
2327
2427
2527
2627
2727
2827
2927
3027
3127

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 32% 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 (%)
139272860
239272860
338272870
437272970
536272970
635273080
734273080
833273190
932273190
1031283290
11302832100
12292833100
13282833110
14272734120
15262734120
16252634140
17252634151
18242534171
19232434181
20222334201
21212234221
22212133231
23202133251
24202033261
25191932282
26181932292
27181932302
28171831312
29171831322
30161830323
31161830333

Wind in December

Winds average 22 km/h in December.

Across December, daily wind ranges from about 21 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1022breezy
1122breezy
1222breezy
1322breezy
1422breezy
1522breezy
1622breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3021breezy
3121breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 18 min at the start of December to 14 h 30 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 5:27 AM to 5:36 AM, and sunset from 7:46 PM to 8:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:277:46
214.35:277:47
314.35:277:48
414.45:277:49
514.45:277:49
614.45:277:50
714.45:277:51
814.45:277:52
914.45:277:53
1014.45:277:53
1114.55:277:54
1214.55:277:55
1314.55:287:56
1414.55:287:56
1514.55:287:57
1614.55:287:58
1714.55:297:58
1814.55:297:59
1914.55:297:59
2014.55:308:00
2114.55:308:00
2214.55:318:01
2314.55:318:01
2414.55:328:02
2514.55:328:02
2614.55:338:02
2714.55:338:03
2814.55:348:03
2914.55:358:03
3014.55:358:04
3114.55:368:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.67 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.12 kWh/m² to a high of 7.67 kWh/m² in December across the year — December's 7.67 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
67.6Intense
77.6Intense
87.6Intense
97.6Intense
107.6Intense
117.6Intense
127.6Intense
137.6Intense
147.7Intense
157.7Intense
167.7Intense
177.7Intense
187.7Intense
197.7Intense
207.7Intense
217.7Intense
227.7Intense
237.7Intense
247.7Intense
257.7Intense
267.7Intense
277.7Intense
287.7Intense
297.6Intense
307.6Intense
317.6Intense
Planning a trip in December

Is December a good time to visit Mar del Tuyú?

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

7.2
Sightseeing
3rd-best month of the year
4.8
Beach & pool
3rd-best month of the year

December is one of the better times to visit Mar del Tuyú for general sightseeing.

What to pack for Mar del Tuyú in December

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

In December, Mar del Tuyú sees daytime highs around 22°C and nights near 18°C. Pack sun protection. Worth having: a windbreaker. About 8 days see rain.

sun protectiona windbreaker

Sea temperature near Mar del Tuyú in December

The nearest coast averages about 20°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 22°C and coldest in July near 11°C.

It's comfortable for a long swim from Dec 18 to Mar 31 — about 3.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar21Refreshing
Apr19Cool
May16Cool
Jun13Bracing
Jul11Bracing
Aug11Bracing
Sep12Bracing
Oct15Bracing
Nov17Cool
Dec20Cool

UV index in Mar del Tuyú 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 Mar del Tuyú peaks around January 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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 19UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr5High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug3Moderate
Sep5High
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Mar del Tuyú?

Mar del Tuyú sits at 36.6°S, 56.7°W, 13 m above sea level, in Argentina. The nearest listed city is Santa Teresita, 4.0 km away.

Topography around Mar del Tuyú

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

Within 3 km, the terrain around Mar del Tuyú has only modest variations in elevation — a maximum elevation change of 18 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 34 m; within 80 km, only modest variations in elevation — a maximum elevation change of 33 m.

The land around Mar del Tuyú is covered by water (38%), grassland (25%) and artificial surfaces (21%) within 3 km, water (47%) and grassland (36%) within 16 km, and water (44%) and grassland (39%) within 80 km.

3 km
18 m
16 km
34 m
80 km
33 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Santa Teresita 4.0 km · Mar de Ajó 17 km · Pinamar 62 km · General Juan Madariaga 62 km · Villa Gesell 81 km · Dolores 92 km · Santa Clara del Mar 158 km · Chascomús 162 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

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 Mar del Tuyú (-36.5743°, -56.6939°, elevation 13 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).