Mar del Plata weather in January

In January, Mar del Plata sees average daytime highs of 23°C and overnight lows near 17°C, with 77 mm of rain across 8.3 wet days and about 14.3 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 49% of the time in January, and the air most often feels humid.

Daylight stretches from about 14 h 36 min at the start of January to 14 hours by month's end. Set against the rest of the year, January is Mar del Plata's 1st-clearest and 6th-windiest month. For the whole year in context, see Mar del Plata's year-round climate.

Daytime high
23°
1st warmest
Overnight low
17°
11th coldest
Rainfall
77 mm
8.3 wet days
Daylight
14 h 24 min
5:49 AM – 8:10 PM
Cloud cover
44%
1st clearest
Wind
20 km/h
6th windiest
Solar energy
7.36 kWh/m²
Travel score
7.4
out of 10

Mar del Plata is city in Buenos Aires Province, Argentina.

Density
7,465/km²
people per km²
Founded
1874

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical January day in Mar del Plata reaches about 23°C in the afternoon and slips back to 17°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 27°C. Set against its neighbours, January runs about 2°C warmer than December and on par with February.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12317
22317
32317
42317
52317
62317
72317
82317
92317
102317
112317
122317
132317
142317
152317
162317
172317
182317
192317
202317
212317
222317
232317
242317
252317
262317
272317
282317
292317
302317
312317

Mar del Plata weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 17°778.314.37.4
Feb23° / 17°767.513.57.3
Mar21° / 16°728.112.37.0
Apr19° / 13°778.6116.3
May15° / 11°496.8105.0
Jun13° / 606.99.43.7
Jul11° / 5479.63.1
Aug12° / 60710.53.6
Sep14° / 607.511.74.1
Oct16° / 10°809135.1
Nov19° / 13°779.314.16.3
Dec22° / 15°69814.67.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36535
46535
56535
66634
76634
86535
96535
106634
116634
126634
136733
146733
156832
166832
176832
186832
196832
206832
216832
226832
236733
246733
256733
266634
276535
286436
296436
306436
316238

Chance of precipitation in January

Any precipitation

Mar del Plata gets around 77 mm of rain over 8.3 wet days in January. 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 (%)
125
226
326
426
526
626
726
826
926
1026
1126
1227
1327
1427
1526
1626
1726
1826
1926
2026
2126
2226
2326
2427
2527
2627
2727
2828
2928
3028
3128

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the humid band about 31% 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 (%)
1262734140
2262733140
3262733140
4262733150
5262732150
6262731150
7262831150
8272831150
9272830150
10272830150
11272830150
12272830150
13272830150
14262831160
15262731160
16262631170
17262631170
18252531180
19252432190
20252432200
21242332210
22242332210
23232232221
24232232231
25232131241
26232131241
27232131251
28232030261
29232029261
30242029261
31242028271

Wind in January

Winds average 20 km/h in January.

Across January, daily wind ranges from about 20 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy
3120breezy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 36 min at the start of January to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over January. Sunrise moves from 5:36 AM to 6:04 AM, and sunset from 8:11 PM to 8:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.65:368:11
214.65:368:11
314.65:378:12
414.65:388:12
514.65:398:12
614.55:398:12
714.55:408:12
814.55:418:12
914.55:428:12
1014.55:438:12
1114.55:448:11
1214.45:458:11
1314.45:468:11
1414.45:478:11
1514.45:488:11
1614.45:498:10
1714.35:508:10
1814.35:518:10
1914.35:528:09
2014.35:538:09
2114.35:548:09
2214.25:558:08
2314.25:568:08
2414.25:578:07
2514.15:588:07
2614.15:598:06
2714.16:008:05
2814.16:018:05
2914.06:028:04
3014.06:038:03
3114.06:048:03

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.36 kWh/m².

For context, solar energy here swings from a low near 1.92 kWh/m² to a high of 7.61 kWh/m² in December across the year — January's 7.36 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.6Intense
27.6Intense
37.6Intense
47.6Intense
57.6Intense
67.6Intense
77.6Intense
87.6Intense
97.6Intense
107.5Intense
117.5Intense
127.5Intense
137.5Intense
147.5Intense
157.5Intense
167.4Intense
177.4Intense
187.4Intense
197.3Intense
207.3Intense
217.3Intense
227.2Intense
237.2Intense
247.2Intense
257.1Intense
267.1Intense
277.0Intense
287.0Intense
296.9Intense
306.9Intense
316.8Intense
Planning a trip in January

Is January a good time to visit Mar del Plata?

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

7.4
Sightseeing
1st-best month of the year
5.9
Beach & pool
1st-best month of the year

January is one of the better times to visit Mar del Plata for general sightseeing.

What to pack for Mar del Plata in January

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

In January, Mar del Plata sees daytime highs around 23°C and nights near 17°C. Pack sun protection. Worth having: light clothes and rain gear. About 8 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Mar del Plata in January

The nearest coast averages about 20°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in February at about 20°C and coldest in August near 10°C.

It's comfortable for a long swim from Jan 29 to Mar 10 — about 1.3 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan20Cool
Feb20Refreshing
Mar20Cool
Apr18Cool
May15Cool
Jun13Bracing
Jul11Bracing
Aug10Bracing
Sep11Bracing
Oct13Bracing
Nov15Bracing
Dec17Cool

UV index in Mar del Plata in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Plata 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 Mar del Plata?

Mar del Plata sits at 38.0°S, 57.6°W, 14 m above sea level, in Argentina. The nearest listed city is Santa Clara del Mar, 19 km away.

Topography around Mar del Plata

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

Within 3 km, the terrain around Mar del Plata has only modest variations in elevation — a maximum elevation change of 51 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 125 m; within 80 km, significant variations in elevation — a maximum elevation change of 386 m.

The land around Mar del Plata is covered by artificial surfaces (70%) within 3 km, water (45%) and cropland (23%) within 16 km, and water (35%), cropland (31%) and grassland (30%) within 80 km.

3 km
51 m
16 km
125 m
80 km
386 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Santa Clara del Mar 19 km · Miramar 39 km · Balcarce 64 km · Villa Gesell 97 km · Pinamar 116 km · General Juan Madariaga 117 km · Necochea 120 km · Ayacucho 125 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 Plata (-38.0004°, -57.5562°, elevation 14 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).