Posadas climate

Name: Posadas
Address: AR

Posadas is warmest in January, with average highs of 31 °C, and coldest in July, when nights average 12 °C. October is the wettest month (220 mm) and August the driest (92 mm). Figures are 1991–2020 climate normals.

Across a full year Posadas averages 1,721 mm of rain and 222 days above 25 °C.

Argentina · 83 m elevation · population 305,874 · 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 31 °C
Coldest month July 12 °C
Driest month August 92 mm
Wettest month October 220 mm
Least cloud August 43 % cloud
Hottest on record November 39 °C
Coldest on record July 0.9 °C

What to expectPosadas through the year

Posadas has a clear annual cycle: average daily highs run from 20 °C in July to 31 °C in January, a swing of 11 °C in mean temperature across the year.

Counted across a normal year, 222 days a year reach 25 °C, 88 of them reach 30 °C. The warmest reading in the 1991–2020 record is 39 °C, in November.

Rain is strongly seasonal. October averages 220 mm against 92 mm in August — 2.4 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	31.0 °C	131 mm	48 %
February	30.1 °C	134 mm	48 %
March	29.0 °C	122 mm	45 %
April	26.1 °C	163 mm	46 %
May	22.1 °C	145 mm	52 %
June	20.5 °C	123 mm	54 %
July	20.1 °C	119 mm	48 %
August	22.5 °C	92 mm	43 %
September	24.3 °C	147 mm	46 %
October	26.6 °C	220 mm	53 %
November	28.2 °C	160 mm	46 %
December	30.2 °C	164 mm	48 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	31.0 °C	22.7 °C	26.6 °C	37.1 °C	15.2 °C	31	20
February	30.1 °C	22.2 °C	25.8 °C	37.2 °C	13.9 °C	27	14
March	29.0 °C	20.9 °C	24.6 °C	37.3 °C	10.5 °C	28	12
April	26.1 °C	18.2 °C	21.7 °C	33.7 °C	7.9 °C	18	5
May	22.1 °C	14.9 °C	18.0 °C	32.9 °C	3.6 °C	7	0
June	20.5 °C	13.4 °C	16.4 °C	29.1 °C	1.7 °C	6	0
July	20.1 °C	12.2 °C	15.5 °C	30.2 °C	0.9 °C	6	0
August	22.5 °C	13.5 °C	17.4 °C	33.1 °C	1.5 °C	11	2
September	24.3 °C	15.1 °C	19.2 °C	36.1 °C	3.2 °C	13	4
October	26.6 °C	17.9 °C	21.8 °C	37.0 °C	7.4 °C	20	6
November	28.2 °C	19.1 °C	23.4 °C	38.7 °C	8.6 °C	25	9
December	30.2 °C	21.5 °C	25.6 °C	38.5 °C	12.8 °C	30	17

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	131 mm	13	14 h/day	48 %	74 %	15 km/h
February	134 mm	12	13 h/day	48 %	77 %	14 km/h
March	122 mm	11	12 h/day	45 %	77 %	14 km/h
April	163 mm	10	11 h/day	46 %	79 %	15 km/h
May	145 mm	9	11 h/day	52 %	81 %	15 km/h
June	123 mm	9	10 h/day	54 %	82 %	16 km/h
July	119 mm	9	11 h/day	48 %	80 %	16 km/h
August	92 mm	8	11 h/day	43 %	75 %	17 km/h
September	147 mm	10	12 h/day	46 %	75 %	17 km/h
October	220 mm	12	13 h/day	53 %	77 %	18 km/h
November	160 mm	11	13 h/day	46 %	73 %	17 km/h
December	164 mm	11	14 h/day	48 %	74 %	16 km/h

How Posadas 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
Posadas	31 °C	12 °C	1,721 mm	222
Ituzaingó · Argentina	31 °C	12 °C	1,684 mm	221
Ciudad del Este · Paraguay	31 °C	14 °C	1,830 mm	253
Formosa · Argentina	32 °C	13 °C	1,569 mm	248

Where Posadas ranks

Ranking	Position	Value
The warmest places in South America in January	34th of 50	31 °C
The warmest places in South America in December	48th of 50	30 °C

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

QuestionsCommon questions about Posadas’s climate

When is the best time to visit Posadas?

That depends on what you want, so the honest answer is a comparison rather than a single month. April, September, October 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 Posadas get?

In January, the warmest month, daily highs average 31 °C. About 88 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 12 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Posadas?

October, averaging 220 mm over 12 days with rain. The driest month is August with 92 mm. The year as a whole averages 1,721 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 Posadas 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: -27.392°, -55.924° , 83 m above sea level (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.