Avellaneda climate

Name: Avellaneda
Address: AR

Avellaneda is warmest in January, with average highs of 28 °C, and coldest in July, when nights average 7.2 °C. October is the wettest month (111 mm) and August the driest (67 mm). Figures are 1991–2020 climate normals.

Across a full year Avellaneda averages 1,002 mm of rain, 101 days above 25 °C and 0 days below freezing.

Argentina · population 367,554 · 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 28 °C
Coldest month July 7.2 °C
Driest month August 67 mm
Wettest month October 111 mm
Least cloud January 39 % cloud
Hottest on record December 38 °C
Coldest on record June -1.5 °C
Warmest sea January 25 °C

What to expectAvellaneda through the year

Avellaneda has a clear annual cycle: average daily highs run from 14 °C in July to 28 °C in January, a swing of 14 °C in mean temperature across the year.

Counted across a normal year, 101 days a year reach 25 °C, 19 of them reach 30 °C, 0 nights drop below freezing. The warmest reading in the 1991–2020 record is 38 °C, in December.

Rain is spread fairly evenly through the year, from 67 mm in August to 111 mm in October. There is no dry season to aim for.

The sea off Avellaneda is warmest in January at 25 °C and coldest in July at 13 °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	28.0 °C	87 mm	39 %
February	26.8 °C	91 mm	40 %
March	24.8 °C	92 mm	42 %
April	21.1 °C	96 mm	47 %
May	17.4 °C	68 mm	55 %
June	14.5 °C	68 mm	56 %
July	13.5 °C	71 mm	55 %
August	15.8 °C	67 mm	51 %
September	17.6 °C	75 mm	51 %
October	20.5 °C	111 mm	52 %
November	23.8 °C	95 mm	45 %
December	26.8 °C	82 mm	40 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.0 °C	20.3 °C	23.9 °C	36.7 °C	12.1 °C	26	8
February	26.8 °C	19.6 °C	23.0 °C	35.2 °C	10.6 °C	20	4
March	24.8 °C	18.0 °C	21.1 °C	33.3 °C	8.8 °C	14	1
April	21.1 °C	14.5 °C	17.5 °C	30.9 °C	5.1 °C	3	0
May	17.4 °C	11.3 °C	14.1 °C	26.6 °C	1.4 °C	0	0
June	14.5 °C	8.4 °C	11.1 °C	23.0 °C	-1.5 °C	0	0
July	13.5 °C	7.2 °C	10.1 °C	23.7 °C	-1.2 °C	0	0
August	15.8 °C	8.6 °C	11.9 °C	28.4 °C	-0.2 °C	0	0
September	17.6 °C	10.3 °C	13.7 °C	28.3 °C	1.3 °C	1	0
October	20.5 °C	13.2 °C	16.6 °C	31.6 °C	2.8 °C	2	0
November	23.8 °C	15.9 °C	19.7 °C	33.3 °C	5.8 °C	11	1
December	26.8 °C	18.6 °C	22.5 °C	38.0 °C	8.8 °C	22	5

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	87 mm	7	14 h/day	39 %	69 %	23 km/h	24.8 °C
February	91 mm	7	13 h/day	40 %	72 %	22 km/h	24.8 °C
March	92 mm	7	12 h/day	42 %	75 %	21 km/h	23.4 °C
April	96 mm	8	11 h/day	47 %	77 %	21 km/h	20.5 °C
May	68 mm	6	10 h/day	55 %	81 %	20 km/h	17.2 °C
June	68 mm	6	9.8 h/day	56 %	81 %	21 km/h	14.0 °C
July	71 mm	7	10 h/day	55 %	80 %	21 km/h	12.6 °C
August	67 mm	6	11 h/day	51 %	78 %	22 km/h	13.4 °C
September	75 mm	7	12 h/day	51 %	75 %	23 km/h	15.0 °C
October	111 mm	9	13 h/day	52 %	75 %	24 km/h	17.9 °C
November	95 mm	8	14 h/day	45 %	70 %	24 km/h	20.7 °C
December	82 mm	8	14 h/day	40 %	67 %	24 km/h	23.2 °C

Where Avellaneda ranks

Ranking	Position	Value
The coolest places in South America in July	16th of 50	14 °C
The coolest places in South America in June	20th of 50	14 °C
The coolest places in South America in August	21st of 50	16 °C
The coolest places in South America in September	24th of 50	18 °C
The coolest places in South America in May	26th of 50	17 °C
The coolest places in the world in July	29th of 50	14 °C

Planning a trip? See the best time to visit Avellaneda.

QuestionsCommon questions about Avellaneda’s climate

When is the best time to visit Avellaneda?

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

How hot does Avellaneda get?

In January, the warmest month, daily highs average 28 °C. About 19 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 7.2 °C in July, the coldest month. A normal year has 0 nights below freezing.

Which month is wettest in Avellaneda?

October, averaging 111 mm over 9 days with rain. The driest month is August with 67 mm. The year as a whole averages 1,002 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 Avellaneda 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
Data point: -34.660°, -58.367° (the coordinates the reanalysis values are taken for)
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.