Mar del Plata climate

Name: Mar del Plata
Address: AR

Mar del Plata is warmest in January, with average highs of 25 °C, and coldest in July, when nights average 6.0 °C. January is the wettest month (87 mm) and May the driest (45 mm). Figures are 1991–2020 climate normals.

Across a full year Mar del Plata averages 810 mm of rain, 54 days above 25 °C and 0 days below freezing.

Argentina · population 593,337 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month January 25 °C
Coldest month July 6.0 °C
Driest month May 45 mm
Wettest month January 87 mm
Least cloud December 44 % cloud
Hottest on record January 36 °C
Coldest on record July -1.3 °C
Warmest sea February 20 °C

What to expectMar del Plata through the year

Mar del Plata has a clear annual cycle: average daily highs run from 12 °C in July to 25 °C in January, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 54 days a year reach 25 °C, 8 of them reach 30 °C, 0 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in January.

Rain is spread fairly evenly through the year, from 45 mm in May to 87 mm in January. There is no dry season to aim for.

The sea off Mar del Plata is warmest in February at 20 °C and coldest in August at 10 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	25.2 °C	87 mm	44 %
February	24.3 °C	78 mm	46 %
March	22.5 °C	70 mm	48 %
April	19.1 °C	77 mm	53 %
May	15.8 °C	45 mm	60 %
June	12.9 °C	52 mm	60 %
July	11.8 °C	50 mm	60 %
August	13.5 °C	55 mm	57 %
September	14.7 °C	57 mm	57 %
October	17.4 °C	80 mm	56 %
November	20.5 °C	84 mm	49 %
December	23.7 °C	75 mm	44 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	25.2 °C	16.9 °C	20.7 °C	36.3 °C	9.3 °C	16	3
February	24.3 °C	16.9 °C	20.3 °C	34.9 °C	9.3 °C	12	2
March	22.5 °C	15.6 °C	18.8 °C	31.6 °C	8.2 °C	7	0
April	19.1 °C	12.7 °C	15.5 °C	29.4 °C	4.3 °C	1	0
May	15.8 °C	10.0 °C	12.6 °C	25.7 °C	1.7 °C	0	0
June	12.9 °C	7.2 °C	9.7 °C	21.5 °C	0.7 °C	0	0
July	11.8 °C	6.0 °C	8.6 °C	22.0 °C	-1.3 °C	0	0
August	13.5 °C	6.7 °C	9.7 °C	26.6 °C	-0.5 °C	0	0
September	14.7 °C	7.7 °C	10.8 °C	27.0 °C	-0.1 °C	0	0
October	17.4 °C	10.0 °C	13.3 °C	28.5 °C	2.4 °C	1	0
November	20.5 °C	12.4 °C	16.2 °C	30.2 °C	3.5 °C	4	0
December	23.7 °C	15.1 °C	19.1 °C	35.2 °C	5.4 °C	12	2

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	87 mm	9	15 h/day	44 %	72 %	24 km/h	19.7 °C
February	78 mm	8	14 h/day	46 %	74 %	23 km/h	20.4 °C
March	70 mm	8	12 h/day	48 %	75 %	23 km/h	19.9 °C
April	77 mm	8	11 h/day	53 %	76 %	23 km/h	17.8 °C
May	45 mm	6	10 h/day	60 %	78 %	22 km/h	15.4 °C
June	52 mm	6	9.5 h/day	60 %	78 %	24 km/h	12.8 °C
July	50 mm	6	9.8 h/day	60 %	78 %	23 km/h	10.9 °C
August	55 mm	6	11 h/day	57 %	77 %	24 km/h	10.4 °C
September	57 mm	7	12 h/day	57 %	77 %	24 km/h	10.8 °C
October	80 mm	9	13 h/day	56 %	77 %	24 km/h	12.5 °C
November	84 mm	10	14 h/day	49 %	74 %	25 km/h	14.8 °C
December	75 mm	9	15 h/day	44 %	71 %	25 km/h	17.4 °C

How Mar del Plata compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Mar del Plata	25 °C	6.0 °C	810 mm	54
La Plata · Argentina	28 °C	7.4 °C	974 mm	91
Montevideo · Uruguay	25 °C	8.6 °C	1,095 mm	59
Avellaneda · Argentina	28 °C	7.2 °C	1,002 mm	101

Where Mar del Plata ranks

Ranking	Position	Value
The coolest places in South America in July	4thof 50	12 °C
The coolest places in South America in June	5thof 50	13 °C
The coolest places in South America in August	6thof 50	14 °C
The coolest places in South America in September	7thof 50	15 °C
The coolest places in South America in May	11thof 50	16 °C
The coolest places in the world in July	11thof 50	12 °C

Planning a trip? See the best time to visit Mar del Plata.

QuestionsCommon questions about Mar del Plata’s climate

When is the best time to visit Mar del Plata?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, January is the warmest month and May the driest. The month-by-month table above has the full picture.

How hot does Mar del Plata get?

In January, the warmest month, daily highs average 25 °C. About 8 days a year pass 30 °C. The highest value in the 1991–2020 record is 36 °C.

How cold does it get in winter?

Nights average 6.0 °C in July, the coldest month. A normal year has 0 nights below freezing.

Which month is wettest in Mar del Plata?

January, averaging 87 mm over 9 days with rain. The driest month is May with 45 mm. The year as a whole averages 810 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Mar del Plata rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.