The highest day temperature in August 2025 was 76°F. The lowest night temperature was 39°F. The average values for day and night temperatures during August were 59.4°F и 49.8°F respectivly.

The average sea surface temperature in August 2025 for Montevideo was 54.6°F. The maximum and minimum values were 51.8°F and 58.4°F respectively.

Most of the days in August are sunny but you can also expect cloudy and gloomy days.

Precipitation total in August for Montevideo is 2.8 in.

The average wind speed in August is 10.2 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Montevideo in August is 6.8 hours.