Average annual temperature is 26.1 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: 18.4 °C
Number of sunny days: 40 days
Number of rainy days: 325 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) | 32.7 | 32.5 | 33.6 | 32.8 | 32.0 | 31.6 | 32.3 | 34.3 | 35.4 | 35.7 | 35.2 | 32.8 |
| Average daytime temperature (°C) | 30.0 | 29.8 | 29.1 | 29.6 | 29.7 | 28.9 | 30.1 | 31.9 | 32.5 | 33.1 | 31.5 | 30.3 |
| Average temperature (°C) | 25.6 | 25.5 | 25.3 | 25.4 | 25.8 | 24.8 | 25.6 | 26.7 | 27.2 | 27.7 | 26.8 | 26.1 |
| Average night temperature (°C) | 22.6 | 22.9 | 22.9 | 22.9 | 23.2 | 22.2 | 22.6 | 23.3 | 23.8 | 24.4 | 23.9 | 23.6 |
| Absolute minimum temperature (°C) | 21.0 | 21.8 | 22.1 | 21.8 | 21.6 | 18.4 | 21.5 | 21.8 | 22.4 | 23.0 | 22.8 | 22.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.4 | 12.3 | 12.1 | 12.0 | 11.9 | 11.8 | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.4 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 8.9 | 8.2 | 6.9 | 7.6 | 9.2 | 9.0 | 10.1 | 10.1 | 9.6 | 9.7 | 9.2 | 8.2 |
| Precipitation (mm) | 240 | 274 | 361 | 341 | 336 | 167 | 145 | 128 | 198 | 140 | 321 | 460 |
| Sunny days | 3 | 1 | 2 | 0 | 0 | 5 | 5 | 6 | 9 | 6 | 3 | 0 |
| Rainy days | 28 | 27 | 29 | 30 | 31 | 25 | 26 | 25 | 21 | 25 | 27 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan is at