Weather in Montevideo in August 2025
Average weather
Average temperature in Montevideo in August
Going from a maximum of +73°F during the day to a minimum of +37°F during the night, the temperature in August averages around +61°F.
The average maximum temperature goes down 30% by the end of the month, compared with the beginning of the month, from +72°F to +61°F.
Is Montevideo warm or cold in August?
Montevideo is typically mild in August.
Maximum temperatures go up compared to the previous month from +57°F to +59°F. The minimum temperature also goes up from +46°F to +48°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the coolest months in Montevideo, here is the comparison with other months:
Water temperature in Montevideo in August
Water in Montevideo in August is Cold. It varies from +51°F to +58°F, with an average of +54°F. This is almost similar to the air temperature, which averages +59°F.
The water temperature in August is one of the coldest of the entire year:
Can you swim in Montevideo in August?
Climate in Montevideo in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +57°F | +59°F | +61°F | ||||
| Min. temperature | ||||||
| +28°F | +32°F | +34°F | ||||
| Max. temperature | ||||||
| +81°F | +88°F | +90°F | ||||
| Rainfall | ||||||
| 84 mm | 84 mm | 84 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +53°F | +54°F | +57°F | ||||
| Humidity | ||||||
| 80% | 78% | 77% | ||||
| Air pressure | ||||||
| 1017 HPa | 1017 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 10 | 10 | 10 | ||||
| Cloudy days | ||||||
| 9 | 9 | 8 | ||||
| Rainy days | ||||||
| 10 | 9 | 9 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +57°F to +59°F during the day. The rainfall amount in August stays the same as in the previous month with a 84 mm of total precipitation. It feels drier, as humidity decreases from 80% to 78%. The average wind speed doesn’t change much during August, staying around 4 m/s. The amount of sunny days stay about the same, averaging 10 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Montevideo is gradually decreasing during August, going from 4 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Montevideo?
Climate Change Over the Years
The climate in Montevideo in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1984 (+65°F) and the highest in 2017 (+72°F). The driest year was 1979 with only 542 mm of rainfall, and the wettest year was 2019 with 3342 mm.
FAQ
Is August a good time to visit Montevideo?
Can you sunbathe in Montevideo in August?
Can you swim in Montevideo in August?
Is Montevideo rainy in August?
Is it sunny in Montevideo in August?
Monthly weather in Montevideo
Source of the data
For this page, we’ve looked at the typical weather in Montevideo, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.