San Miguel de Tucumán climate

Name: San Miguel de Tucumán
Address: AR

San Miguel de Tucumán is warmest in December, with average highs of 28 °C, and coldest in July, when nights average 7.1 °C. January is the wettest month (315 mm) and August the driest (44 mm). Figures are 1991–2020 climate normals.

Across a full year San Miguel de Tucumán averages 1,986 mm of rain, 154 days above 25 °C and 1 days below freezing.

Argentina · population 548,866 · 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 December 28 °C
Coldest month July 7.1 °C
Driest month August 44 mm
Wettest month January 315 mm
Least cloud August 30 % cloud
Hottest on record October 42 °C
Coldest on record July -6.4 °C

What to expectSan Miguel de Tucumán through the year

San Miguel de Tucumán has a clear annual cycle: average daily highs run from 18 °C in July to 28 °C in December, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 154 days a year reach 25 °C, 48 of them reach 30 °C, 1 nights drop below freezing. The warmest reading in the 1991–2020 record is 42 °C, in October.

Rain is strongly seasonal. January averages 315 mm against 44 mm in August — 7.1 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	27.9 °C	315 mm	66 %
February	26.7 °C	261 mm	65 %
March	25.0 °C	266 mm	64 %
April	22.3 °C	178 mm	59 %
May	19.3 °C	122 mm	55 %
June	17.6 °C	69 mm	46 %
July	17.7 °C	48 mm	35 %
August	21.3 °C	44 mm	30 %
September	23.9 °C	77 mm	36 %
October	26.1 °C	160 mm	50 %
November	27.2 °C	203 mm	55 %
December	28.2 °C	244 mm	59 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	27.9 °C	19.6 °C	23.4 °C	38.0 °C	12.6 °C	25	9
February	26.7 °C	18.9 °C	22.4 °C	36.9 °C	11.4 °C	19	5
March	25.0 °C	17.8 °C	21.0 °C	34.2 °C	10.1 °C	16	2
April	22.3 °C	15.0 °C	18.2 °C	31.0 °C	5.3 °C	7	0
May	19.3 °C	11.7 °C	15.1 °C	30.0 °C	1.6 °C	2	0
June	17.6 °C	8.6 °C	12.6 °C	27.5 °C	0.1 °C	0	0
July	17.7 °C	7.1 °C	11.9 °C	33.0 °C	-6.4 °C	1	0
August	21.3 °C	8.9 °C	14.5 °C	35.7 °C	-0.4 °C	8	2
September	23.9 °C	11.5 °C	17.2 °C	38.6 °C	1.3 °C	13	4
October	26.1 °C	14.9 °C	20.1 °C	41.6 °C	5.2 °C	18	7
November	27.2 °C	17.0 °C	21.8 °C	40.8 °C	8.2 °C	20	9
December	28.2 °C	18.8 °C	23.2 °C	38.5 °C	10.3 °C	25	10

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	315 mm	19	14 h/day	66 %	80 %	9.1 km/h
February	261 mm	18	13 h/day	65 %	82 %	9.0 km/h
March	266 mm	19	12 h/day	64 %	85 %	8.8 km/h
April	178 mm	15	11 h/day	59 %	85 %	8.6 km/h
May	122 mm	13	11 h/day	55 %	84 %	8.1 km/h
June	69 mm	9	10 h/day	46 %	81 %	8.1 km/h
July	48 mm	7	11 h/day	35 %	74 %	8.5 km/h
August	44 mm	6	11 h/day	30 %	64 %	9.3 km/h
September	77 mm	8	12 h/day	36 %	60 %	10 km/h
October	160 mm	13	13 h/day	50 %	66 %	11 km/h
November	203 mm	15	13 h/day	55 %	70 %	10 km/h
December	244 mm	17	14 h/day	59 %	75 %	10 km/h

How San Miguel de Tucumán 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
San Miguel de Tucumán	28 °C	7.1 °C	1,986 mm	154
Santiago del Estero · Argentina	32 °C	9.9 °C	828 mm	230
Catamarca · Argentina	30 °C	6.0 °C	886 mm	178
Salta · Argentina	25 °C	6.4 °C	2,225 mm	82
San Salvador de Jujuy · Argentina	23 °C	6.6 °C	2,480 mm	36
La Rioja · Argentina	30 °C	6.1 °C	598 mm	158
Antofagasta · Chile	25 °C	13 °C	16 mm	26

Where San Miguel de Tucumán ranks

Ranking	Position	Value
Places with the best weather in South America in September	16th of 50	93/100
Places with the best weather in South America in August	48th of 50	92/100
The coolest places in South America in June	48th of 50	18 °C

Planning a trip? See the best time to visit San Miguel de Tucumán.

QuestionsCommon questions about San Miguel de Tucumán’s climate

When is the best time to visit San Miguel de Tucumán?

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

How hot does San Miguel de Tucumán get?

In December, the warmest month, daily highs average 28 °C. About 48 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.

How cold does it get in winter?

Nights average 7.1 °C in July, the coldest month. A normal year has 1 nights below freezing.

Which month is wettest in San Miguel de Tucumán?

January, averaging 315 mm over 19 days with rain. The driest month is August with 44 mm. The year as a whole averages 1,986 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 San Miguel de Tucumán 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: -26.816°, -65.211° (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.