Montevideo climate

Name: Montevideo
Address: UY

Montevideo is warmest in January, with average highs of 25 °C, and coldest in July, when nights average 8.6 °C. October is the wettest month (115 mm) and January the driest (76 mm). Figures are 1991–2020 climate normals.

Across a full year Montevideo averages 1,095 mm of rain, 59 days above 25 °C and 0 days below freezing.

Uruguay · population 1,270,737 · 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 8.6 °C
Driest month January 76 mm
Wettest month October 115 mm
Least cloud January 42 % cloud
Hottest on record December 36 °C
Coldest on record July -0.1 °C
Warmest sea February 24 °C

What to expectMontevideo through the year

Montevideo has a clear annual cycle: average daily highs run from 13 °C in July to 25 °C in January, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 59 days a year reach 25 °C, 4 of them reach 30 °C, 0 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in December.

Rain is spread fairly evenly through the year, from 76 mm in January to 115 mm in October. There is no dry season to aim for.

The sea off Montevideo is warmest in February at 24 °C and coldest in July at 11 °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	25.5 °C	76 mm	42 %
February	25.0 °C	99 mm	46 %
March	23.5 °C	97 mm	46 %
April	20.3 °C	101 mm	52 %
May	17.0 °C	77 mm	58 %
June	14.2 °C	81 mm	59 %
July	13.1 °C	86 mm	58 %
August	14.8 °C	94 mm	56 %
September	15.9 °C	84 mm	55 %
October	18.5 °C	115 mm	55 %
November	21.4 °C	104 mm	47 %
December	24.1 °C	80 mm	43 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	25.5 °C	19.7 °C	22.5 °C	34.7 °C	13.4 °C	18	2
February	25.0 °C	19.7 °C	22.2 °C	34.6 °C	13.1 °C	14	1
March	23.5 °C	18.4 °C	20.8 °C	32.8 °C	11.9 °C	9	0
April	20.3 °C	15.6 °C	17.8 °C	31.9 °C	7.7 °C	2	0
May	17.0 °C	12.7 °C	14.6 °C	25.8 °C	5.2 °C	0	0
June	14.2 °C	9.9 °C	11.8 °C	24.8 °C	2.6 °C	0	0
July	13.1 °C	8.6 °C	10.6 °C	25.3 °C	-0.1 °C	0	0
August	14.8 °C	9.6 °C	11.9 °C	27.3 °C	0.8 °C	0	0
September	15.9 °C	10.7 °C	13.1 °C	28.2 °C	4.3 °C	0	0
October	18.5 °C	13.2 °C	15.6 °C	28.9 °C	6.3 °C	1	0
November	21.4 °C	15.5 °C	18.3 °C	32.8 °C	7.8 °C	4	0
December	24.1 °C	18.0 °C	20.9 °C	35.9 °C	10.6 °C	12	1

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	76 mm	7	14 h/day	42 %	71 %	23 km/h	23.4 °C
February	99 mm	8	13 h/day	46 %	73 %	22 km/h	23.6 °C
March	97 mm	8	12 h/day	46 %	74 %	21 km/h	22.4 °C
April	101 mm	8	11 h/day	52 %	75 %	21 km/h	19.4 °C
May	77 mm	7	10 h/day	58 %	78 %	20 km/h	16.1 °C
June	81 mm	8	9.8 h/day	59 %	79 %	22 km/h	12.9 °C
July	86 mm	7	10 h/day	58 %	79 %	22 km/h	11.1 °C
August	94 mm	8	11 h/day	56 %	78 %	22 km/h	11.9 °C
September	84 mm	8	12 h/day	55 %	76 %	23 km/h	13.4 °C
October	115 mm	9	13 h/day	55 %	76 %	23 km/h	16.3 °C
November	104 mm	8	14 h/day	47 %	73 %	23 km/h	19.1 °C
December	80 mm	8	14 h/day	43 %	70 %	23 km/h	21.7 °C

How Montevideo 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
Montevideo	25 °C	8.6 °C	1,095 mm	59
La Plata · Argentina	28 °C	7.4 °C	974 mm	91
Avellaneda · Argentina	28 °C	7.2 °C	1,002 mm	101
Buenos Aires · Argentina	28 °C	7.6 °C	1,070 mm	96

Where Montevideo ranks

Ranking	Position	Value
The coolest places in South America in September	9th of 50	16 °C
The coolest places in South America in August	11th of 50	15 °C
The coolest places in South America in July	12th of 50	13 °C
The coolest places in South America in June	13th of 50	14 °C
The coolest places in South America in May	18th of 50	17 °C
The coolest places in South America in October	19th of 50	18 °C

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

QuestionsCommon questions about Montevideo’s climate

When is the best time to visit Montevideo?

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 January the driest. The month-by-month table above has the full picture.

How hot does Montevideo get?

In January, the warmest month, daily highs average 25 °C. About 4 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 8.6 °C in July, the coldest month. A normal year has 0 nights below freezing.

Which month is wettest in Montevideo?

October, averaging 115 mm over 9 days with rain. The driest month is January with 76 mm. The year as a whole averages 1,095 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 Montevideo 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: -34.903°, -56.188° (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.