Santa Clara del Mar weather in December

In December, Santa Clara del Mar sees average daytime highs of 23°C and overnight lows near 15°C, with 70 mm of rain across 8 wet days and about 14.6 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 25°C by the end. The sky is clear or mostly clear about 49% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 24 min at the start of December to 14 h 36 min by month's end. Set against the rest of the year, December is Santa Clara del Mar's 1st-clearest and 1st-windiest month. For the whole year in context, see Santa Clara del Mar's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
15°
9th coldest
Rainfall
70 mm
8 wet days
Daylight
14 h 36 min
5:28 AM – 8:04 PM
Cloud cover
45%
1st clearest
Wind
18 km/h
1st windiest
Solar energy
7.52 kWh/m²
Travel score
7.4
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 25°C by the end.

A typical December day in Santa Clara del Mar reaches about 23°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 28°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°151015202531
Avg high (°C)Avg low (°C)
12213
22213
32214
42214
52214
62214
72214
82214
92314
102314
112314
122314
132314
142315
152315
162315
172315
182415
192415
202415
212415
222415
232416
242416
252416
262416
272416
282516
292516
302516
312516

Santa Clara del Mar 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
Jan25° / 17°818.514.37.4
Feb24° / 17°747.613.57.4
Mar22° / 15°727.912.37.2
Apr19° / 12°80811.16.5
May16° / 10°486.5105.3
Jun13° / 596.29.43.9
Jul12° / 536.49.63.4
Aug13° / 606.810.54.1
Sep15° / 607.111.74.7
Oct17° / 10°839.3135.7
Nov20° / 12°839.4146.6
Dec23° / 15°70814.67.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36238
46238
56238
66139
76139
86139
96040
106040
116040
126040
136139
146139
156139
166238
176238
186238
196337
206337
216337
226337
236337
246337
256337
266436
276535
286535
296535
306535
316535

Chance of precipitation in December

Any precipitation

Santa Clara del Mar gets around 70 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 (%)
128
228
328
427
527
627
726
826
925
1025
1125
1225
1325
1425
1525
1625
1726
1826
1926
2026
2126
2227
2327
2427
2527
2627
2727
2827
2927
3027
3127

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 42% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15530141
25530141
35430151
45430151
55330152
65230162
75230162
85130172
95130172
105030182
114930183
124831183
134731193
144631194
154531194
164431205
174231216
184131226
193931227
203831238
213731249
223530259
2334302610
2433292711
2532282812
2631282813
2730272914
2829273014
2928263015
3028263115
3127263116

Wind in December

Winds average 18 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 18 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 24 min at the start of December to 14 h 36 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 7:53 PM to 8:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:277:53
214.45:277:54
314.55:277:54
414.55:277:55
514.55:277:56
614.55:267:57
714.55:267:58
814.55:277:59
914.55:277:59
1014.65:278:00
1114.65:278:01
1214.65:278:02
1314.65:278:02
1414.65:278:03
1514.65:288:04
1614.65:288:04
1714.65:288:05
1814.65:298:06
1914.65:298:06
2014.65:298:07
2114.65:308:07
2214.65:308:08
2314.65:318:08
2414.65:318:09
2514.65:328:09
2614.65:328:09
2714.65:338:10
2814.65:348:10
2914.65:348:10
3014.65:358:11
3114.65:368:11

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.52 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.93 kWh/m² to a high of 7.52 kWh/m² in December across the year — December's 7.52 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.3Intense
57.4Intense
67.4Intense
77.4Intense
87.4Intense
97.4Intense
107.5Intense
117.5Intense
127.5Intense
137.5Intense
147.5Intense
157.5Intense
167.5Intense
177.5Intense
187.6Intense
197.6Intense
207.6Intense
217.6Intense
227.6Intense
237.6Intense
247.6Intense
257.6Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.5Intense
317.5Intense
Planning a trip in December

Is December a good time to visit Santa Clara del Mar?

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

7.4
Sightseeing
1st-best month of the year
5.8
Beach & pool
3rd-best month of the year

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

What to pack for Santa Clara del Mar in December

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

In December, Santa Clara del Mar sees daytime highs around 23°C and nights near 15°C. Pack sun protection. Worth having: light clothes and rain gear. About 8 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Santa Clara del Mar in December

The nearest coast averages about 18°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 21°C and coldest in August near 10°C.

It's comfortable for a long swim from Jan 21 to Mar 13 — about 1.7 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb21Refreshing
Mar20Refreshing
Apr18Cool
May15Cool
Jun13Bracing
Jul11Bracing
Aug10Bracing
Sep11Bracing
Oct13Bracing
Nov15Cool
Dec18Cool

UV index in Santa Clara del Mar 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 Santa Clara del Mar peaks around December 22 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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeDec 22UV 12Jun 20UV 2
UV index (midday)Level
Jan12Extreme
Feb11Extreme
Mar8Very high
Apr5High
May3Moderate
Jun2Low
Jul2Moderate
Aug3Moderate
Sep5Moderate
Oct7Very high
Nov10Extreme
Dec12Extreme
Location & terrain

Where is Santa Clara del Mar?

Santa Clara del Mar sits at 37.8°S, 57.5°W, 10 m above sea level, in Argentina. The nearest listed city is Mar del Plata, 19 km away.

Topography around Santa Clara del Mar

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

Within 3 km, the terrain around Santa Clara del Mar has only modest variations in elevation — a maximum elevation change of 35 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, significant variations in elevation — a maximum elevation change of 384 m.

The land around Santa Clara del Mar is covered by water (30%), grassland (25%) and cropland (21%) within 3 km, water (42%), cropland (27%) and grassland (24%) within 16 km, and grassland (34%), water (32%) and cropland (29%) within 80 km.

3 km
35 m
16 km
52 m
80 km
384 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Mar del Plata 19 km · Miramar 57 km · Balcarce 66 km · Villa Gesell 79 km · General Juan Madariaga 98 km · Pinamar 98 km · Ayacucho 115 km · Necochea 134 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 Santa Clara del Mar (-37.8344°, -57.5075°, elevation 10 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).