Climate averages 1991–2020
Montevideo weather
in August.
A cool, wet month: the 10th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a cool month in Montevideo: daytime highs average 14.5°C and nights cool to about 9.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 97 mm of rain on roughly 9 days, which makes August a wet month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 49 min on an average August day.
The nearest other city in this atlas is Maldonado (113 km away). In August its highs average 14.4°C, about as warm as Montevideo, with 96 mm of rain.
Among the 4 cities listed in Uruguay, Montevideo ranks 3rd of 4 for the warmest August highs and 3rd of 4 for the driest August (rainfall, lowest first). The mean August high of those 4 cities is 16.5°C; Montevideo is 2.0°C cooler than that mean.
From August to September, average highs rise by 1.1°C to 15.6°C, and monthly rainfall falls from 97 mm to 92 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Montevideo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.2°C19.6°C | 19.6°C | 68 | 5.9 | 14.214 h |
| February | 24.7°C19.6°C | 19.6°C | 92 | 7.8 | 13.413 h |
| March | 23.2°C18.3°C | 18.3°C | 97 | 7.9 | 12.312 h |
| April | 20.1°C15.5°C | 15.5°C | 107 | 8.3 | 11.211 h |
| May | 16.7°C12.6°C | 12.6°C | 87 | 7.9 | 10.310 h |
| June | 14.0°C9.8°C | 9.8°C | 90 | 8.6 | 9.910 h |
| July | 12.8°C8.5°C | 8.5°C | 96 | 8.9 | 10.010 h |
| August, selected | 14.5°C9.5°C | 9.5°C | 97 | 8.5 | 10.811 h |
| September | 15.6°C10.6°C | 10.6°C | 92 | 8.3 | 11.812 h |
| October | 18.2°C13.1°C | 13.1°C | 111 | 8.7 | 12.913 h |
| November | 21.1°C15.4°C | 15.4°C | 101 | 7.7 | 13.914 h |
| December | 23.7°C17.9°C | 17.9°C | 73 | 6.9 | 14.414 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Maldonado in AugustUruguay · 113 kmHigh 14.4°C · Low 9.4°C · 96 mm rain
- Berisso in AugustArgentina · 155 kmHigh 15.3°C · Low 8.8°C · 73 mm rain
- La Plata in AugustArgentina · 161 kmHigh 15.3°C · Low 8.5°C · 68 mm rain
- Berazategui in AugustArgentina · 185 kmHigh 15.4°C · Low 8.7°C · 66 mm rain
- Quilmes in AugustArgentina · 190 kmHigh 15.7°C · Low 8.3°C · 66 mm rain
- Mar del Tuyú in AugustArgentina · 191 kmHigh 12.6°C · Low 8.6°C · 77 mm rain
- Avellaneda in AugustArgentina · 201 kmHigh 15.7°C · Low 8.5°C · 66 mm rain
- Buenos Aires in AugustArgentina · 203 kmHigh 15.5°C · Low 8.8°C · 71 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Montevideo) is explained once on the Montevideo year overview and on the Sources, method and limits page.