Mar de Ajó weather in December

In December, Mar de Ajó sees average daytime highs of 21°C and overnight lows near 17°C, with 64 mm of rain across 8.1 wet days and about 14.5 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 20°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 de Ajó's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Mar de Ajó's year-round climate.

Daytime high
21°
4th warmest
Overnight low
17°
9th coldest
Rainfall
64 mm
8.1 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
7.65 kWh/m²
Travel score
7.1
out of 10

Mar de Ajó is human settlement in Argentina.

Founded
1935

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 20°C in the first days to 23°C by the end.

A typical December day in Mar de Ajó reaches about 21°C in the afternoon and slips back to 17°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
32016
42016
52016
62116
72116
82116
92117
102117
112117
122117
132117
142117
152117
162217
172217
182217
192218
202218
212218
222218
232218
242218
252218
262218
272218
282318
292319
302319
312319

Mar de Ajó weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 19°787.814.27.5
Feb23° / 19°847.813.47.3
Mar22° / 18°758.212.37.0
Apr19° / 15°917.811.16.4
May16° / 12°607.310.15.2
Jun13° / 737.19.53.8
Jul11° / 687.59.73.0
Aug12° / 756.910.63.5
Sep13° / 10°737.211.84.1
Oct16° / 12°879.212.95.2
Nov19° / 15°808.2146.4
Dec21° / 17°648.114.57.1

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 13% of December, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36139
46139
56139
66139
76040
86139
96139
106238
116238
126337
136238
146238
156337
166337
176436
186436
196337
206436
216436
226436
236535
246535
256436
266337
276337
286436
296436
306436
316436

Chance of precipitation in December

Any precipitation

Mar de Ajó gets around 64 mm of rain over 8.1 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
1026
1126
1226
1326
1426
1527
1627
1727
1827
1927
2027
2127
2227
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 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 (%)
142292450
241292550
341292560
440282660
539292660
638292770
737292870
836292870
934292970
1033293080
1132293080
1231303190
1330303190
14292932100
15282932110
16272833120
17262833130
18252733150
19242634160
20232534180
21222434191
22212334211
23212234221
24202234241
25202133251
26192033261
27182033271
28181933282
29171933292
30171933302
31161933302

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
2621breezy
2721breezy
2821breezy
2921breezy
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 5:35 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
214.35:267:47
314.45:267:48
414.45:267:49
514.45:267:50
614.45:267:51
714.45:267:51
814.45:267:52
914.45:267:53
1014.55:277:54
1114.55:277:55
1214.55:277:55
1314.55:277:56
1414.55:277:57
1514.55:287:57
1614.55:287:58
1714.55:287:59
1814.55:297:59
1914.55:298:00
2014.55:298:00
2114.55:308:01
2214.55:308:01
2314.55:318:02
2414.55:318:02
2514.55:328:02
2614.55:328:03
2714.55:338:03
2814.55:338:04
2914.55:348:04
3014.55:358:04
3114.55:358:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.65 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 7.65 kWh/m² in December across the year — December's 7.65 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.5Intense
37.5Intense
47.5Intense
57.5Intense
67.5Intense
77.5Intense
87.6Intense
97.6Intense
107.6Intense
117.6Intense
127.6Intense
137.6Intense
147.6Intense
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 de Ajó?

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

7.1
Sightseeing
3rd-best month of the year
4.6
Beach & pool
4th-best month of the year

December is one of the better times to visit Mar de Ajó for general sightseeing.

What to pack for Mar de Ajó in December

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

In December, Mar de Ajó sees daytime highs around 21°C and nights near 17°C. Pack sun protection. Worth having: rain gear and a windbreaker. About 8 days see rain.

sun protectionrain geara windbreaker

Sea temperature near Mar de Ajó 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 at the nearest coast (about 13 km away) 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 de Ajó 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 de Ajó peaks around January 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 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 14UV 12Jun 20UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr5High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug3Moderate
Sep5High
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Mar de Ajó?

Mar de Ajó sits at 36.7°S, 56.7°W, 24 m above sea level, in Argentina. The nearest listed city is Mar del Tuyú, 17 km away.

Topography around Mar de Ajó

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

Within 3 km, the terrain around Mar de Ajó has only modest variations in elevation — a maximum elevation change of 16 m around an average of 5 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 de Ajó is covered by grassland (38%), water (33%) and artificial surfaces (20%) within 3 km, water (48%) and grassland (37%) within 16 km, and water (44%) and grassland (39%) within 80 km.

3 km
16 m
16 km
34 m
80 km
33 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Mar del Tuyú 17 km · Santa Teresita 21 km · Pinamar 46 km · General Juan Madariaga 50 km · Villa Gesell 65 km · Dolores 100 km · Santa Clara del Mar 143 km · Mar del Plata 161 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 de Ajó (-36.7288°, -56.6827°, 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).