Uruguay's moderate climate means mild winters and warm summers. In winter, temperatures average 6-14°C (43-57°F), the coolest month being June. Summer averages sit between 17°-28°C (63-82°F), with January and February the warmest months. Montevideo averages 1090mm (36in) of rain annually, which falls right across the calendar year.
| Month | Temp (°C) | Rainfall (mm) | Humidity (%) | Sunshine (hours) |
| Jan | 17 - 28 | 74 | 4 | |
| Feb | 16 - 28 | 66 | 4 | |
| Mar | 15 - 26 | 99 | 5 | |
| Apr | 12 - 22 | 99 | 8 | |
| May | 9 - 18 | 84 | 10 | |
| Jun | 6 - 15 | 81 | 12 | |
| Jul | 6 - 14 | 74 | 13 | |
| Aug | 6 - 15 | 79 | 12 | |
| Sep | 8 - 17 | 76 | 10 | |
| Oct | 9 - 20 | 66 | 8 | |
| Nov | 12 - 23 | 74 | 5 | |
| Dec | 15 - 26 | 79 | 4 |