Montevideo weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: October – April
What is the weather like in Montevideo in August?
In August, Montevideo is cool: daytime highs average 16 °C, and nights cool down to about 9 °C. The sea averages 12.1 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 88 mm. All in all, August is a good month for a holiday in Montevideo.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 58 | 67 | 76 |
| Day | 14° | 16° | 17° |
| Night | 8° | 9° | 10° |
| Sea | 11° | 12° | 14° |
| Sun | 5 h | 5 h | 6 h |
| Rain days | 7 | 8 | 8 |
More details for August
- Daylight
- 10 h 47 min07:26 – 18:13
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−3America/Montevideo
How the score comes together
- Temperatureweight 50 %75 %
- Sunshineweight 20 %38 %
- Few rainy daysweight 30 %73 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- A jumper for the evenings
Montevideo in August: quick answers
Is Montevideo hot in August?
No. In August, Montevideo is cool: daytime highs average 16 °C and nights drop to about 9 °C.
Can you swim in Montevideo in August?
Only if you don't mind cold water: in August the sea averages just 12.1 °C. Comfortable swimming is possible from December to March.
Does it rain much in Montevideo in August?
Rain falls on about 8 days, adding up to 88 mm.
Montevideo month by month
The whole year in MontevideoAll destinations: UruguayWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences