Average annual temperature is 18.5 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 1.0 °C
Number of sunny days: 197 days
Number of rainy days: 168 days
Look at detailed online map of San Juan
* Weather data for San Juan Uruguay is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 38.4 | 38.4 | 39.0 | 29.1 | 25.5 | 25.2 | 26.4 | 28.0 | 26.4 | 30.1 | 34.5 | 33.3 |
| Average daytime temperature (°C) | 32.7 | 30.2 | 30.9 | 22.7 | 20.1 | 16.9 | 16.4 | 18.3 | 18.4 | 23.1 | 26.3 | 27.8 |
| Average temperature (°C) | 26.4 | 24.5 | 25.7 | 17.7 | 15.5 | 12.4 | 12.2 | 13.1 | 13.9 | 17.2 | 20.6 | 22.5 |
| Average night temperature (°C) | 20.8 | 19.5 | 21.4 | 13.9 | 11.9 | 8.6 | 8.9 | 9.1 | 10.1 | 12.1 | 15.4 | 17.9 |
| Absolute minimum temperature (°C) | 16.4 | 11.8 | 12.8 | 8.3 | 3.4 | 1.2 | 1.0 | 2.4 | 3.9 | 4.3 | 9.6 | 12.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 |
| Daylight mean duration (h) | 14.1 | 13.3 | 12.3 | 11.2 | 10.3 | 9.9 | 10.1 | 10.9 | 11.9 | 12.9 | 13.9 | 14.4 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 |
| Sunshine mean duration (h) | 11.8 | 10.7 | 10.4 | 8.7 | 7.4 | 6.6 | 7.0 | 8.1 | 7.1 | 10.1 | 11.4 | 10.2 |
| Precipitation (mm) | 40 | 53 | 107 | 42 | 129 | 26 | 72 | 77 | 88 | 71 | 81 | 112 |
| Sunny days | 17 | 16 | 15 | 15 | 18 | 17 | 18 | 21 | 16 | 19 | 14 | 11 |
| Rainy days | 14 | 12 | 16 | 15 | 13 | 13 | 13 | 10 | 14 | 12 | 16 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit San Juan during the most sunny months:
The largest precipitation sum in San Juan is at