Average annual temperature is 24.9 °C
Absolute maximum temperature: 42.4 °C
Absolute minimum temperature: 3.7 °C
Number of sunny days: 201 days
Number of rainy days: 164 days
Look at detailed online map of City of San Juan
* Weather data for City of San Juan United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 31.4 | 35.5 | 37.4 | 33.9 | 34.8 | 42.4 | 39.7 | 41.1 | 39.8 | 37.1 | 32.5 | 28.1 |
| Average daytime temperature (°C) | 25.9 | 25.8 | 30.3 | 28.5 | 31.2 | 37.7 | 37.4 | 37.9 | 37.5 | 31.0 | 23.8 | 23.1 |
| Average temperature (°C) | 19.7 | 18.9 | 23.2 | 23.1 | 26.2 | 30.6 | 31.2 | 31.5 | 31.0 | 25.3 | 19.3 | 17.9 |
| Average night temperature (°C) | 15.6 | 14.4 | 18.9 | 19.3 | 22.2 | 25.7 | 26.7 | 26.8 | 26.3 | 21.5 | 15.9 | 13.8 |
| Absolute minimum temperature (°C) | 6.7 | 3.7 | 8.3 | 13.0 | 18.4 | 21.7 | 24.5 | 24.1 | 23.3 | 9.5 | 9.0 | 5.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.7 | 11.3 | 12.0 | 12.8 | 13.4 | 13.7 | 13.6 | 13.0 | 12.3 | 11.5 | 10.9 | 10.5 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.6 | 8.8 | 8.1 | 8.7 | 10.2 | 12.6 | 12.2 | 11.8 | 11.0 | 8.3 | 5.8 | 6.7 |
| Precipitation (mm) | 10 | 7 | 31 | 162 | 78 | 24 | 32 | 43 | 16 | 61 | 117 | 26 |
| Sunny days | 21 | 19 | 16 | 11 | 5 | 22 | 22 | 17 | 16 | 16 | 15 | 21 |
| Rainy days | 10 | 9 | 15 | 19 | 26 | 8 | 9 | 14 | 14 | 15 | 15 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit City of San Juan during the most sunny months:
The largest precipitation sum in City of San Juan is at