Average annual temperature is 27.6 °C
Absolute maximum temperature: 36.8 °C
Absolute minimum temperature: 17.7 °C
Number of sunny days: 286 days
Number of rainy days: 79 days
Look at detailed online map of San Juan
* Weather data for San Juan Peru is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 32.5 | 31.4 | 33.8 | 33.7 | 36.8 | 36.4 | 36.7 | 36.0 | 36.3 | 35.9 | 35.1 | 34.7 |
| Average daytime temperature (°C) | 30.7 | 29.0 | 29.5 | 30.7 | 34.0 | 33.5 | 33.5 | 33.7 | 34.0 | 33.5 | 33.5 | 33.0 |
| Average temperature (°C) | 26.5 | 25.8 | 25.7 | 26.3 | 28.8 | 27.8 | 27.8 | 27.8 | 28.6 | 28.4 | 28.9 | 28.7 |
| Average night temperature (°C) | 23.2 | 23.1 | 22.7 | 22.2 | 23.8 | 22.3 | 22.5 | 22.1 | 23.7 | 23.8 | 24.2 | 24.6 |
| Absolute minimum temperature (°C) | 21.5 | 20.2 | 18.9 | 17.8 | 21.6 | 18.9 | 19.8 | 17.7 | 21.4 | 20.8 | 20.2 | 22.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 13.0 |
| Daylight mean duration (h) | 12.9 | 12.6 | 12.2 | 11.8 | 11.4 | 11.2 | 11.3 | 11.6 | 12.0 | 12.4 | 12.8 | 13.0 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 10.3 | 9.1 | 8.7 | 10.5 | 10.4 | 10.3 | 10.4 | 10.9 | 11.3 | 11.5 | 11.8 | 11.5 |
| Precipitation (mm) | 29 | 141 | 111 | 37 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
| Sunny days | 17 | 5 | 6 | 21 | 31 | 30 | 31 | 31 | 30 | 28 | 28 | 28 |
| Rainy days | 14 | 23 | 25 | 9 | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 3 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan is at