Montevideo weather in July

Name: Montevideo
Address: UY

In July, Montevideo has daytime highs averaging 13 °C, nights around 8.6 °C, with 7.3 wet days, and a sea temperature of 11 °C. Figures are 1991–2020 climate normals.

13.1°C Average high
8.6°C Average low
7.3days Wet days
86mm Rainfall
11.1°C Sea temperature
10h Daylight

Daily temperatures through July

Daily highDaily low Day of month on the horizontal axis. Highs peak at 14.1 °C and lows bottom out at 7.9 °C.

How July develops

Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.

Days	Avg high	Avg low	Chance of rain
1–10 July	13.0 °C	8.7 °C	23 %
11–20 July	13.1 °C	8.5 °C	25 %
21–31 July	13.2 °C	8.6 °C	23 %

Chance of a wet day (over 1 mm) by date in July. Wettest date over the 30 years: July 12, at 50 %. Single dates are noisy — read the shape, not the spikes.

What to expect

Measure	Typical July	Share of the month
Days above 25 °C	0.03 of 31	0 %
Days above 30 °C	0 of 31	0 %
Days below 0 °C	0.03 of 31	0 %
Days with more than 1 mm rain	7.3 of 31	24 %

Conditions in July

Measure	Average
Mean temperature	11 °C
Record high (1991–2020)	25 °C
Record low (1991–2020)	-0.1 °C
Relative humidity	79 %
Wind speed	22 km/h
Cloud cover	58 %

Where Montevideo ranks in July

Ranking	Position	Value
The coolest places in South America in July	12thof 50	13 °C
The coolest places in the world in July	25thof 50	13 °C

July compared with the months around it

Month	Avg high	Rainfall	Cloud
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 %

See all twelve months for Montevideo

July is the 12th warmest month here.
It is the 6th driest month of the year.
It ranks 11th for least cloud cover.
Days last about 10 hours from sunrise to sunset.
It rains on 7.3 of 31 days — 24 % of the month.
Nights are about 4.5 °C cooler than the middle of the day.
The hottest July day on record since 1991 reached 25 °C, 12 °C above the usual daytime high.
Beach score: 16 / 100 — see how this is calculated.

Nearby destinations in July

Destination	Avg high	Wet days	Sea
Montevideo	13 °C	7.3	11
La Plata	13 °C	6	12
Avellaneda	14 °C	7	13
Buenos Aires	13 °C	7	13

QuestionsJuly in Montevideo, answered

How warm is Montevideo in July?

Daily highs average 13 °C and nights fall to about 8.6 °C, a spread of 4.5 °C between afternoon and dawn. That makes July the 12th warmest month of the year here.

Does it rain much in Montevideo in July?

July averages 86 mm of rain, spread over about 7 of the 31 days — 24 % of the month. Cloud cover averages 58 % of the sky.

Is the sea warm enough to swim in July?

The sea averages 11 °C off Montevideo in July. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.

How long are the days in July?

Montevideo averages 10 hours between sunrise and sunset in July. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.

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: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. 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.